Merge branch 'ab/aix-needs-compat-regex' into maint

Build fix.

* ab/aix-needs-compat-regex:
  config.mak.uname: set NO_REGEX=NeedsStartEnd on AIX

Author: gitster

config.mak.uname

@@ -237,6 +237,7 @@ ifeq ($(uname_S),AIX)
 	NO_MKDTEMP = YesPlease
 	NO_STRLCPY = YesPlease
 	NO_NSEC = YesPlease
+	NO_REGEX = NeedsStartEnd
 	FREAD_READS_DIRECTORIES = UnfortunatelyYes
 	INTERNAL_QSORT = UnfortunatelyYes
 	NEEDS_LIBICONV = YesPlease