This test covers several validation edge cases with detecting feedback
loops and buffers bound to multiple types of binding.

Bug: angleproject:2747
Change-Id: I612a4fcf1870667a821ebcba2d3948695b3cabd5
Reviewed-on: https://chromium-review.googlesource.com/1174094Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>