This reverts commit e3e964f9.

Reason for revert: Crashing in ANGLE. See:

https://github.com/KhronosGroup/glslang/issues/2452

Original change's description:
> Roll glslang from 142cb87f803d to beec2e4a7c4d (12 revisions)
>
> https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/142cb87f803d..beec2e4a7c4d
>
> If this roll has caused a breakage, revert this CL and stop the roller
> using the controls here:
> https://autoroll.skia.org/r/glslang-angle-autoroll
> Please CC timvp@google.com on the revert to ensure that a human
> is aware of the problem.
>
> To report a problem with the AutoRoller itself, please file a bug:
> https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug
>
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md
>
> Bug: None
> Tbr: timvp@google.com
> Change-Id: Id080fa0082678bbd1c5cf0e2a80b6f274b6fdb1c
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2537654
> Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
> Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

TBR=timvp@google.com,angle-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: I74df7e875299dfd12ed4d91aec8513218ef54c7d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2537234Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>