diff-* --patch-with-raw

This new flag outputs the diff-raw output and diff-patch output
at the same time.  Requested by Cogito.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff.h

@@ -24,6 +24,7 @@ struct diff_options {
 	const char *orderfile;
 	const char *pickaxe;
 	unsigned recursive:1,
+		 with_raw:1,
 		 tree_in_recursive:1,
 		 full_index:1;
 	int break_opt;