git: update for git 2.0

prefixcmp() and suffixcmp() have been remove, functionality is now
provided by starts_with() and ends_with(). Retrurn values have been
changed, so instead of just renaming we have to fix logic.
Everything else looks just fine.

ui-shared.c

@@ -128,7 +128,7 @@ const char *cgit_repobasename(const char *reponame)
 	/* strip trailing slashes */
 	while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 	/* strip trailing .git */
-	if (p >= 3 && !prefixcmp(&rvbuf[p-3], ".git")) {
+	if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 		p -= 3; rvbuf[p--] = 0;
 	}
 	/* strip more trailing slashes if any */