Fix usage string to match that given in the man page

Still not managed to understand git-send-mail sufficiently well to  not
accidently miss of this list when I sending it to Junio

Signed-off-by: Alan Chandler <alan@chandlerfamily.org.uk>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git.c

@@ -16,7 +16,7 @@
 #include "builtin.h"
 
 const char git_usage_string[] =
-	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
+	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]";
 
 static void prepend_to_path(const char *dir, int len)
 {