Set DEFAULT_TEXT_DOMAIN in lib/util's Makefile not individual .c files.

We no longer need to include sudo_gettext.h before sudo_compat.h

lib/util/mkdir_parents.c

@@ -36,11 +36,9 @@
 #include <errno.h>
 #include <fcntl.h>
 
-#define DEFAULT_TEXT_DOMAIN	"sudo"
-#include "sudo_gettext.h"	/* must be included before sudo_compat.h */
-
 #include "sudo_compat.h"
 #include "sudo_fatal.h"
+#include "sudo_gettext.h"
 #include "sudo_debug.h"
 #include "sudo_util.h"