1) Make it possible to run the script from any working directory
2) Abort the run if angle_perftests is executing multiple test cases
3) Print some information on which exe and test is running
4) Print the test runner output in case there was an error
BUG=angleproject:596
Change-Id: If30c2455dc39b0a776df03e6c1dda2ced90d73ba
Reviewed-on: https://chromium-review.googlesource.com/319090Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
