Reorder the clockid_t values to match existing practice. (bytecodealliance#112)

Move `CLOCK_REALTIME` to be the first `clockid_t` value. This change
reflects the definitions used in [existing practice], so this patch
updates the `wasi_unstable_preview0` and `wasi_unstable` definitions
as well.

This is the same change as bytecodealliance#41, but updated for the WASI repository's
new phases directory structure.

[existing practice]: https://github.com/CraneStation/wasi-libc/blob/master/libc-bottom-half/headers/public/wasi/core.h#L42

Author: sunfishcode

phases/ephemeral/docs/wasi_ephemeral_preview.md

@@ -1113,6 +1113,11 @@ Used by [`__wasi_subscription_t`](#subscription), [`__wasi_clock_res_get()`](#cl
 
 Possible values:
 
+- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
+
+    The clock measuring real time. Time value
+    zero corresponds with 1970-01-01T00:00:00Z.
+
 - <a href="#clockid.monotonic" name="clockid.monotonic"></a>**`__WASI_CLOCK_MONOTONIC`**
 
     The store-wide monotonic clock, which is defined as a
@@ -1127,11 +1132,6 @@ Possible values:
     The CPU-time clock associated with the current
     process.
 
-- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
-
-    The clock measuring real time. Time value
-    zero corresponds with 1970-01-01T00:00:00Z.
-
 - <a href="#clockid.thread_cputime_id" name="clockid.thread_cputime_id"></a>**`__WASI_CLOCK_THREAD_CPUTIME_ID`**
 
     The CPU-time clock associated with the current thread.

phases/ephemeral/witx/typenames.witx

@@ -16,16 +16,16 @@
 ;; Identifiers for clocks.
 (typename $clockid_t
   (enum u32
+    ;; The clock measuring real time. Time value zero corresponds with
+    ;; 1970-01-01T00:00:00Z.
+    $CLOCK_REALTIME
     ;; The store-wide monotonic clock, which is defined as a clock measuring
     ;; real time, whose value cannot be adjusted and which cannot have negative
     ;; clock jumps. The epoch of this clock is undefined. The absolute time
     ;; value of this clock therefore has no meaning.
     $CLOCK_MONOTONIC
     ;; The CPU-time clock associated with the current process.
     $CLOCK_PROCESS_CPUTIME_ID
-    ;; The clock measuring real time. Time value zero corresponds with
-    ;; 1970-01-01T00:00:00Z.
-    $CLOCK_REALTIME
     ;; The CPU-time clock associated with the current thread.
     $CLOCK_THREAD_CPUTIME_ID
   )

phases/old/docs/wasi_unstable_preview0.md

@@ -1113,6 +1113,11 @@ Used by [`__wasi_subscription_t`](#subscription), [`__wasi_clock_res_get()`](#cl
 
 Possible values:
 
+- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
+
+    The clock measuring real time. Time value
+    zero corresponds with 1970-01-01T00:00:00Z.
+
 - <a href="#clockid.monotonic" name="clockid.monotonic"></a>**`__WASI_CLOCK_MONOTONIC`**
 
     The store-wide monotonic clock, which is defined as a
@@ -1127,11 +1132,6 @@ Possible values:
     The CPU-time clock associated with the current
     process.
 
-- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
-
-    The clock measuring real time. Time value
-    zero corresponds with 1970-01-01T00:00:00Z.
-
 - <a href="#clockid.thread_cputime_id" name="clockid.thread_cputime_id"></a>**`__WASI_CLOCK_THREAD_CPUTIME_ID`**
 
     The CPU-time clock associated with the current thread.

phases/old/witx/typenames.witx

@@ -16,16 +16,16 @@
 ;; Identifiers for clocks.
 (typename $clockid_t
   (enum u32
+    ;; The clock measuring real time. Time value zero corresponds with
+    ;; 1970-01-01T00:00:00Z.
+    $CLOCK_REALTIME
     ;; The store-wide monotonic clock, which is defined as a clock measuring
     ;; real time, whose value cannot be adjusted and which cannot have negative
     ;; clock jumps. The epoch of this clock is undefined. The absolute time
     ;; value of this clock therefore has no meaning.
     $CLOCK_MONOTONIC
     ;; The CPU-time clock associated with the current process.
     $CLOCK_PROCESS_CPUTIME_ID
-    ;; The clock measuring real time. Time value zero corresponds with
-    ;; 1970-01-01T00:00:00Z.
-    $CLOCK_REALTIME
     ;; The CPU-time clock associated with the current thread.
     $CLOCK_THREAD_CPUTIME_ID
   )

phases/unstable/docs/wasi_unstable_preview0.md

@@ -1113,6 +1113,11 @@ Used by [`__wasi_subscription_t`](#subscription), [`__wasi_clock_res_get()`](#cl
 
 Possible values:
 
+- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
+
+    The clock measuring real time. Time value
+    zero corresponds with 1970-01-01T00:00:00Z.
+
 - <a href="#clockid.monotonic" name="clockid.monotonic"></a>**`__WASI_CLOCK_MONOTONIC`**
 
     The store-wide monotonic clock, which is defined as a
@@ -1127,11 +1132,6 @@ Possible values:
     The CPU-time clock associated with the current
     process.
 
-- <a href="#clockid.realtime" name="clockid.realtime"></a>**`__WASI_CLOCK_REALTIME`**
-
-    The clock measuring real time. Time value
-    zero corresponds with 1970-01-01T00:00:00Z.
-
 - <a href="#clockid.thread_cputime_id" name="clockid.thread_cputime_id"></a>**`__WASI_CLOCK_THREAD_CPUTIME_ID`**
 
     The CPU-time clock associated with the current thread.

phases/unstable/witx/typenames.witx

@@ -16,16 +16,16 @@
 ;; Identifiers for clocks.
 (typename $clockid_t
   (enum u32
+    ;; The clock measuring real time. Time value zero corresponds with
+    ;; 1970-01-01T00:00:00Z.
+    $CLOCK_REALTIME
     ;; The store-wide monotonic clock, which is defined as a clock measuring
     ;; real time, whose value cannot be adjusted and which cannot have negative
     ;; clock jumps. The epoch of this clock is undefined. The absolute time
     ;; value of this clock therefore has no meaning.
     $CLOCK_MONOTONIC
     ;; The CPU-time clock associated with the current process.
     $CLOCK_PROCESS_CPUTIME_ID
-    ;; The clock measuring real time. Time value zero corresponds with
-    ;; 1970-01-01T00:00:00Z.
-    $CLOCK_REALTIME
     ;; The CPU-time clock associated with the current thread.
     $CLOCK_THREAD_CPUTIME_ID
   )