restore cwd so that other tests that rely on it don't break
restore cwd so that other tests that rely on it don't break

autopulated/yotta,stevenewey/yotta,eyeye/yotta,ntoll/yotta,ARMmbed/yotta,BlackstoneEngineering/yotta,BlackstoneEngineering/yotta,ntoll/yotta,eyeye/yotta,autopulated/yotta,theotherjimmy/yotta,ARMmbed/yotta,theotherjimmy/yotta,stevenewey/yotta