Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.

Patch by Gareth Rees.

Misc/NEWS

@@ -597,6 +597,9 @@ Build
 - Issue #10910: Avoid C++ compilation errors on FreeBSD and OS X.
   Also update FreedBSD version checks for the original ctype UTF-8 workaround.
 
+- Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.
+  Patch by Gareth Rees.
+
 
 What's New in Python 3.5.2?
 ===========================

Python/random.c

@@ -9,9 +9,10 @@
 #  ifdef HAVE_LINUX_RANDOM_H
 #    include <linux/random.h>
 #  endif
-#  ifdef HAVE_GETRANDOM
+#  if defined(HAVE_GETRANDOM) || defined(HAVE_GETENTROPY)
 #    include <sys/random.h>
-#  elif defined(HAVE_GETRANDOM_SYSCALL)
+#  endif
+#  if !defined(HAVE_GETRANDOM) && defined(HAVE_GETRANDOM_SYSCALL)
 #    include <sys/syscall.h>
 #  endif
 #endif