Roll src/third_party/glslang/src 86258aab8096..38b4db48f98c (1 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/86258aab8096..38b4db48f98c

git log 86258aab8096..38b4db48f98c --date=short --no-merges --format='%ad %ae %s'
2019-11-23 cepheus@frii.com Fix #1983: __ is okay starting with ES 300, rather than 310.

Created with:
  gclient setdep -r src/third_party/glslang/src@38b4db48f98c

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/glslang-chromium-autoroll
Please CC radial-bots+chrome-roll@google.com,courtneygo@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/+/master/autoroll/README.md

Bug: None
Tbr: radial-bots+chrome-roll@google.com,courtneygo@google.com
Change-Id: If44dc21fe7ccb9ab6550c4aa71dfc26945f1cd11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1932022Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#718439}

DEPS

@@ -959,7 +959,7 @@ deps = {
   },
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '86258aab80969d326fb228d7f61d1c05310678ee',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '38b4db48f98c4e3a9cc405de3a76547b857e1c37',
 
   'src/third_party/google_toolbox_for_mac/src': {
       'url': Var('chromium_git') + '/external/github.com/google/google-toolbox-for-mac.git' + '@' + Var('google_toolbox_for_mac_revision'),