Roll glslang from 6f723ebbe3b0 to 2cf9621d6d6f (4 revisions)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/6f723ebbe3b0..2cf9621d6d6f

2020-05-21 dneto@google.com Reorder member init to match decl order (#2241)
2020-05-21 40001162+alelenv@users.noreply.github.com Add support for primitive culling layout qualifier. (#2220)
2020-05-21 rharrison@google.com Replace incorrect uint32_t with correct int vars (#2235)
2020-05-21 shuizhuyuanluo@126.com Do not build glslang-testsuite when ENABLE_CTEST is disabled (#2240)

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,geofflang@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/+doc/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
Tbr: radial-bots+chrome-roll@google.com,geofflang@google.com
Change-Id: I4b5d3dfae32bd796af4a6612eafd3b9bf14225d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2212358Reviewed-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@{#771211}

DEPS

@@ -927,7 +927,7 @@ deps = {
     Var('chromium_git') + '/codecs/libgav1.git' + '@' + '638ef84819f8b3cd614dcf63378fe4814aa4cb2a',
 
   'src/third_party/glslang/src':
-    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '6f723ebbe3b0eba0c543fa615b53fbdc3e6e22c7',
+    Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '2cf9621d6d6f3b5e38f471709f45d35720a7ffee',
 
   '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'),