Roll src/third_party/glslang/src 7f77b2e8669a..5d0e01d9e7f9 (6 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/7f77b2e8669a..5d0e01d9e7f9

git log 7f77b2e8669a..5d0e01d9e7f9 --date=short --no-merges --format='%ad %ae %s'
2019-11-05 johnkslang@users.noreply.github.com Merge pull request #1961 from zoddicus/fixChromiumRoll
2019-11-04 johnkslang@users.noreply.github.com Merge pull request #1953 from null77/gn-add-missing-headers
2019-11-04 johnkslang@users.noreply.github.com Merge pull request #1954 from corporateshark/master
2019-11-03 cepheus@frii.com Tests: Add more test results for the previous generator version bump.
2019-11-03 cepheus@frii.com Bump up the generator version, which is exposed in SPV test results.
2019-11-01 cepheus@frii.com Merge branch 'dneto0-dead-code'

Created with:
  gclient setdep -r src/third_party/glslang/src@5d0e01d9e7f9

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,jonahr@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

TBR=radial-bots+chrome-roll@google.com,jonahr@google.com

Bug: None
Change-Id: I0c02ba75ec1709fd70dfd6719100fe81b7bb01ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899360Reviewed-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@{#712505}

DEPS

@@ -978,7 +978,7 @@ deps = {
   },
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '7f77b2e8669ae06acbee9c9867be8b13e4054f9c',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '5d0e01d9e7f9fae7609843d00f9fc5f41c3ddfdd',
 
   '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'),