Roll src/third_party/glslang/src 4d2298bfd78a..9f46e3dd5e11 (1 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/4d2298bfd78a..9f46e3dd5e11

git log 4d2298bfd78a..9f46e3dd5e11 --date=short --first-parent --format='%ad %ae %s'
2020-04-17 63069047+pmistryNV@users.noreply.github.com Add support for extension GL_ARB_shader_bit_encoding (#2183)

Created with:
  gclient setdep -r src/third_party/glslang/src@9f46e3dd5e11

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,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/+/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:android_angle_vk32_deqp_rel_ng;luci.chromium.try:android_angle_vk32_rel_ng;luci.chromium.try:android_angle_vk64_deqp_rel_ng;luci.chromium.try:android_angle_vk64_rel_ng;luci.chromium.try:linux_angle_deqp_rel_ng;luci.chromium.try:linux-angle-rel;luci.chromium.try:win-angle-rel-32;luci.chromium.try:win-angle-rel-64;luci.chromium.try:win-angle-deqp-rel-32;luci.chromium.try:win-angle-deqp-rel-64
Bug: None
Tbr: radial-bots+chrome-roll@google.com,timvp@google.com
Change-Id: I00b0098ecaa0215beac97f1190bc01faa645c855
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154552Reviewed-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@{#760028}

DEPS

@@ -924,7 +924,7 @@ deps = {
     Var('chromium_git') + '/codecs/libgav1.git' + '@' + '638ef84819f8b3cd614dcf63378fe4814aa4cb2a',
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '4d2298bfd78a82f77f2325c4ade096ccdab1f00d',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '9f46e3dd5e11febbfbed971e74e10ed638e6578d',
 
   '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'),