Rolling 2 dependencies

Roll third_party/SPIRV-Tools/ 29af42df1..f701237f2 (6 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools/+log/29af42df12a3..f701237f2d88

$ git log 29af42df1..f701237f2 --date=short --no-merges --format='%ad %ae %s'
2019-08-12 stevenperron Remove useless semi-colons (#2789)
2019-08-09 greg Instrument: Fix version 2 output record write for tess eval shaders. (#2782)
2019-08-08 stevenperron Start SPIRV-Tools v2019.5
2019-08-08 stevenperron Finalize SPIRV-Tools v2019.4
2019-08-08 stevenperron Add descriptor array scalar replacement (#2742)
2019-08-08 stevenperron Update CHANGES

Roll third_party/glslang/ 3cea2e588..37fc4d27d (4 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/3cea2e5882e3..37fc4d27d612

$ git log 3cea2e588..37fc4d27d --date=short --no-merges --format='%ad %ae %s'
2019-08-09 rharrison Make non-emscripten flags platform agnostic.
2019-08-09 rharrison Converted ENABLE_HLSL to a dependent option, so it can be always disabled in web builds
2019-08-09 rharrison Move build instructions to README.md
2019-08-08 rharrison Add WASM build target for Web version of glslang

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

Change-Id: Ic09942c1a4d64d8ae5f158d0932b15f784c1f980
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10061
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/DEPS b/DEPS
index bb3bbd5..0f06147 100644
--- a/DEPS
+++ b/DEPS
@@ -56,7 +56,7 @@
 
   # SPIRV compiler dependencies: SPIRV-Tools, SPIRV-headers, glslang and shaderc
   'third_party/SPIRV-Tools': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@29af42df12a383db6c243cb8edf84913b776a2e8',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@f701237f2d88af13fe9f920f29f288dc7157c262',
     'condition': 'dawn_standalone',
   },
   'third_party/spirv-headers': {
@@ -64,7 +64,7 @@
     'condition': 'dawn_standalone',
   },
   'third_party/glslang': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@3cea2e5882e3455731a8b6657fb06db913eb3aa1',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@37fc4d27d612d3b0c916933e16dab3da5bb7ab34',
     'condition': 'dawn_standalone',
   },
   'third_party/shaderc': {