patch 8.2.5071: with some Mac OS version clockid_t is redefined

Problem:    With some Mac OS version clockid_t is redefined.
Solution:   Adjust #ifdefs. (Ozaki Kiichi, closes #10549)

Author: ichizok

src/os_mac.h

@@ -272,15 +272,14 @@
 
 # include <dispatch/dispatch.h>
 
-# if !defined(MAC_OS_X_VERSION_10_12) || \
-	(MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12)
+# ifndef MAC_OS_X_VERSION_10_12
 typedef int clockid_t;
 # endif
 # ifndef CLOCK_REALTIME
-#   define CLOCK_REALTIME 0
+#  define CLOCK_REALTIME 0
 # endif
 # ifndef CLOCK_MONOTONIC
-#   define CLOCK_MONOTONIC 1
+#  define CLOCK_MONOTONIC 1
 # endif
 
 struct itimerspec

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5071,
 /**/
     5070,
 /**/