Making fileutils test handle any checkout dir

This is needed since the checkout dir is not always named 'trunk', e.g. on branches and buildbot checkouts.

BUG=Tests fails if checkout dir is not named trunk.
TEST=test_support_unittests in a couple of different working directory setups.

Review URL: https://webrtc-codereview.appspot.com/915004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/src@2957 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed