Also use 'track_object_refs = 0' in update-server-info.

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

update-server-info.c

@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "object.h"
 
 static const char update_server_info_usage[] =
 "git-update-server-info [--force]";
@@ -7,6 +8,8 @@ int main(int ac, char **av)
 {
 	int i;
 	int force = 0;
+	track_object_refs = 0;
+
 	for (i = 1; i < ac; i++) {
 		if (av[i][0] == '-') {
 			if (!strcmp("--force", av[i]) ||