Roll src/third_party/glslang/src 8db9eccc0baf..40801e31ed0c (1 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/8db9eccc0baf..40801e31ed0c

git log 8db9eccc0baf..40801e31ed0c --date=short --first-parent --format='%ad %ae %s'
2020-01-06 johnkslang@users.noreply.github.com Merge pull request #2050 from ShchchowAMD/built_in_MaxVector

Created with:
  gclient setdep -r src/third_party/glslang/src@40801e31ed0c

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,cwallez@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,cwallez@google.com
Change-Id: Id7d6e06d5ab333ed7ca84b5561d4de80b4931a06
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1988162Reviewed-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@{#728573}

DEPS

@@ -959,7 +959,7 @@ deps = {
   },
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '8db9eccc0baf30c9d22c496ab28db0fe1e4e97c5',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '40801e31ed0cd8501c5daa0fe56e4e825165cc9e',
 
   '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'),