Make main_cmds and other_cmds local to builtin-help.c

These are not used anywhere else.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-help.c

@@ -273,7 +273,7 @@ static int git_help_config(const char *var, const char *value, void *cb)
 	return git_default_config(var, value, cb);
 }
 
-struct cmdnames main_cmds, other_cmds;
+static struct cmdnames main_cmds, other_cmds;
 
 void list_common_cmds_help(void)
 {