Roll src/third_party/glslang/src e157435c1e77..1fff36235504 (1 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/e157435c1e77..1fff36235504

git log e157435c1e77..1fff36235504 --date=short --first-parent --format='%ad %ae %s'
2020-04-01 cepheus@frii.com Build warning: Fix #2167: Remove nested reuse of 'unreachable'.

Created with:
  gclient setdep -r src/third_party/glslang/src@1fff36235504

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

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,cwallez@google.com
Change-Id: I2ee56ce72f255e18175a6f883051aabad2a79a7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2131505Reviewed-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@{#755283}

DEPS

@@ -933,7 +933,7 @@ deps = {
     Var('chromium_git') + '/codecs/libgav1.git' + '@' + 'fa1c3c4e673cf12ffa22b8fbe4a7c79314571f1b',
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + 'e157435c1e777aa1052f446dafed162b4a722e03',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '1fff3623550471d20d2a4d0afeeb0bedf28edc54',
 
   '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'),