Add alternative MSVS build path to perf_test_runner
Add alternative MSVS build path to perf_test_runner

If src/tests/tests.sln is built instead of gyp/ANGLE.sln, the test
executable is placed under src/tests/Release*.

TEST=perf_test_runner on Windows

Change-Id: I72ce55e2caa8270bef089c073840d5e2d6caa14d
Reviewed-on: https://chromium-review.googlesource.com/438348
Commit-Queue: Olli Etuaho <38ae6c0e2772a20e8e989f80cb8c99d274e44242@nvidia.com>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

MSOpenTech/angle,ecoal95/angle,ecoal95/angle,MSOpenTech/angle,ecoal95/angle,ppy/angle,ecoal95/angle,MSOpenTech/angle,ecoal95/angle,ppy/angle,ppy/angle,MSOpenTech/angle,ppy/angle