git-sh-setup: add die_with_status

This behaves similar to "die" but can exit with status different from the
usual 1.

Signed-off-by: Fredrik Gustafsson <iveqy@iveqy.com>
Mentored-by: Jens Lehmann <Jens.Lehmann@web.de>
Mentored-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-sh-setup.sh

@@ -40,8 +40,14 @@ git_broken_path_fix () {
 # @@BROKEN_PATH_FIX@@
 
 die () {
-	echo >&2 "$@"
-	exit 1
+	die_with_status 1 "$@"
+}
+
+die_with_status () {
+	status=$1
+	shift
+	echo >&2 "$*"
+	exit "$status"
 }
 
 GIT_QUIET=