app: prevent linux-stable git repo corruption

From f4b9977dbdaaded4dd963b1a4cfd39fdedbe689d Mon Sep 17 00:00:00 2001
From: Petr Oros <poros@redhat.com>
Date: Tue, 24 Jun 2014 09:46:14 +0200
Subject: [PATCH] app: prevent linux-stable git repo corruption

Signed-off-by: Petr Oros <poros@redhat.com>