Also includes a fix for case list paths on developer machines. Also
includes a test expectation update for GLES2.

Bug: angleproject:3353
Change-Id: Idb01eb8d806067739253a6676a6d2d8ee1199929
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1616853
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>