Mount the USB disk as EXT2 explicitly.

We found when we run FAFT many time, the data of USB disk is changed and
causes our test failed. It may be caused by the USB mount command. Adding
the explicit EXT2 type is safer.

BUG=chromium-os:19710
TEST=run_remote_tests.sh --remote=$REMOTE_IP -a "xml_config=$OVERLAY_XML \
        servo_vid=0x18d1 servo_pid=0x5001" UserRequestRecovery/control.normal

Change-Id: I77c4c53d118de7321f835664168dadb6137891d5
Reviewed-on: https://gerrit.chromium.org/gerrit/12533
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed