xkb: move include guards up to wrap the whole file

See: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
Signed-off-by: Mike Gelfand <[email protected]>

Author: mikedld

xkb/xkbDflts.h

@@ -1,8 +1,8 @@
-#include "dix/dix_priv.h"
-
 #ifndef DEFAULT_H
 #define DEFAULT_H 1
 
+#include "dix/dix_priv.h"
+
 #define DPYTYPE	char *
 #define NUM_KEYS	1