Doc: sort time.CLOCK_xxx constants

Doc/library/time.rst

@@ -158,14 +158,6 @@ The module defines the following functions and data items:
    .. versionadded:: 3.3
 
 
-.. data:: CLOCK_REALTIME
-
-   System-wide real-time clock. Setting this clock requires appropriate
-   privileges.
-
-   .. versionadded:: 3.3
-
-
 .. data:: CLOCK_HIGHRES
 
    The Solaris OS has a CLOCK_HIGHRES timer that attempts to use an optimal
@@ -200,6 +192,14 @@ The module defines the following functions and data items:
    .. versionadded:: 3.3
 
 
+.. data:: CLOCK_REALTIME
+
+   System-wide real-time clock. Setting this clock requires appropriate
+   privileges.
+
+   .. versionadded:: 3.3
+
+
 .. data:: CLOCK_THREAD_CPUTIME_ID
 
    Thread-specific CPU-time clock.