Rolling 4 dependencies for Vk1.2 support integration

Roll third_party/SPIRV-Tools/ f8d7df760..323a81fc5 (2 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools/+log/f8d7df760c81..323a81fc5e30

$ git log f8d7df760..323a81fc5 --date=short --no-merges --format='%ad %ae %s'
2019-09-04 alanbaker Validate Vulkan 1.2 capabilities
2019-08-28 dneto Add basic support for Vulkan 1.2: SPV_ENV_VULKAN_1_2

Roll third_party/glslang/ d203754bc..3ed344dd7 (4 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/d203754bc116..3ed344dd784e

$ git log d203754bc..3ed344dd7 --date=short --no-merges --format='%ad %ae %s'
2020-01-16 cepheus Fix #2059, and also attempt to skip test bots [skip ci]
2019-12-24 laddoc Add Error check flag in io mapper
2020-01-15 cepheus Update to latest SPIRV-Tools, supporting Vulkan 1.2.
2020-01-15 cepheus SPV/Vulkan: Add support for Vulkan 1.2, which defaults to SPIR-V 1.5.

Roll third_party/shaderc/ df0e683b5..f53792645 (2 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/df0e683b5835..f53792645f06

$ git log df0e683b5..f53792645 --date=short --no-merges --format='%ad %ae %s'
2020-01-15 rharrison Use the correct comparison when checking for not MSL (#960)
2020-01-15 dneto Support Vulkan 1.2 (#958)

Roll third_party/spirv-cross/ 172e39f03..f9818f080 (7 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Cross/+log/172e39f0398b..f9818f0804e6

$ git log 172e39f03..f9818f080 --date=short --no-merges --format='%ad %ae %s'
2020-01-16 post Update license headers to 2020.
2020-01-16 post Run format_all.sh.
2020-01-16 post MSL: Add support for force-activating IAB resources.
2020-01-16 post Deal with illegal names in types as well.
2020-01-15 post Reflection: Add array stride/matrix stride reflection.
2020-01-15 post Reflection: Emit reflection information for array size literalness.
2020-01-15 post GLSL: Implement geometry shader passthrough extension.

Created with:
  roll-dep third_party/SPIRV-Tools third_party/glslang third_party/shaderc third_party/spirv-cross third_party/spirv-headers

Change-Id: Icf361e327598702ecfc0a4cdd3014d0060f2c083
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15200
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
diff --git a/DEPS b/DEPS
index 7875e8f..08d9677 100644
--- a/DEPS
+++ b/DEPS
@@ -51,13 +51,13 @@
 
   # SPIRV-Cross
   'third_party/spirv-cross': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@172e39f0398b920cfc221b7826c92105d44ad647',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@f9818f0804e6e73ec8afcc523b7e7f8bfc362632',
     'condition': 'dawn_standalone',
   },
 
   # SPIRV compiler dependencies: SPIRV-Tools, SPIRV-headers, glslang and shaderc
   'third_party/SPIRV-Tools': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@f8d7df760c81604ddc4ae3dac7f19333336f64c3',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@323a81fc5e30e43a04e5e22af4cba98ca2a161e6',
     'condition': 'dawn_standalone',
   },
   'third_party/spirv-headers': {
@@ -65,11 +65,11 @@
     'condition': 'dawn_standalone',
   },
   'third_party/glslang': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@d203754bc1160cbb14e80de238042a2b9b439917',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@3ed344dd784ecbbc5855e613786f3a1238823e56',
     'condition': 'dawn_standalone',
   },
   'third_party/shaderc': {
-    'url': '{chromium_git}/external/github.com/google/shaderc@df0e683b583580fcdf5670d05de76a82f39aedcb',
+    'url': '{chromium_git}/external/github.com/google/shaderc@f53792645f0696b8954cfdb3c213f96799dd89b2',
     'condition': 'dawn_standalone',
   },