Accept different path of keys in SAFT kernel handler library.

When running FAFT test cases, the keys are not in the current directory.

BUG=chromium-os:19710
TEST=run_remote_tests.sh --remote=$REMOTE_IP -a "xml_config=$OVERLAY_XML \
         servo_serial=$SERIAL" firmware_RollbackKernel/control$

Change-Id: Ice9868166579da87aeb26784983ae5cd54cc75b7
Reviewed-on: https://gerrit.chromium.org/gerrit/15479
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed