If applying a patch fails during the update process, drop to a shell
instead of exiting; at that point the user can manually apply the patch,
do nothing and "exit" to skip it, or "exit 1" to abort the process.
(From OE-Core rev: c82b28982c4f630c130c827a7da3ac0454cd93b6)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>