Use GIT-1.7.3

This fixes http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-2542.

Noticed-by: Silvio Cesare <silvio.cesare@gmail.com>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
diff --git a/cgit.c b/cgit.c
index 6c7e811..ad62d10 100644
--- a/cgit.c
+++ b/cgit.c
@@ -21,7 +21,7 @@
 {
 	struct string_list_item *item;
 
-	item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
+	item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
 	item->util = xstrdup(value);
 }