By letting fileutils.h know the path to the executable, the tests will be able to find the project root dir and resource file paths even when the test is executed outside the checkout dir.
See http://review.webrtc.org/858014/ for more background.
Today, these tests are failing in the FYI waterfall since they are run "Chromium style" (i.e. from one level above the checkout dir). Since we're moving in that direction this needs to be fixed. It has been fixed for all other tests already.
TEST=Local test execution of vie_auto_test and voe_auto_test with CWD one level above trunk/
Review URL: https://webrtc-codereview.appspot.com/974004
git-svn-id: http://webrtc.googlecode.com/svn/trunk@3173 4adac7df-926f-26a2-2b94-8c16560cd09d
