Roll third_party/SPIRV-Tools/ 7d65bce0b..61b7de3c3 (7 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools/+log/7d65bce0bbe3..61b7de3c39f0

$ git log 7d65bce0b..61b7de3c3 --date=short --no-merges --format='%ad %ae %s'
2020-04-15 stevenperron Remove unreachable code. (#3304)
2020-04-15 afdx spirv-fuzz: Fix to outliner (#3302)
2020-04-14 afdx spirv-fuzz: Do not outline regions that produce pointer outputs (#3291)
2020-04-14 afdx spirv-fuzz: Handle OpRuntimeArray when replacing ids with synonyms (#3292)
2020-04-14 afdx spirv-fuzz: Handle image storage class in donation (#3290)
2020-04-14 afdx spirv-fuzz: Respect rules for OpSampledImage (#3287)
2020-04-14 afdx spirv-fuzz: Fix comment. (#3300)

Created with:
  roll-dep third_party/SPIRV-Tools

TBR=enga@chromium.org
Bug: None

Change-Id: Id5d6a7e37da1225164bcaad4891e106c8c9c8628
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/19660
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/DEPS b/DEPS
index be4c2bf..6094acd 100644
--- a/DEPS
+++ b/DEPS
@@ -67,7 +67,7 @@
 
   # SPIRV compiler dependencies: SPIRV-Tools, SPIRV-headers, glslang and shaderc
   'third_party/SPIRV-Tools': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@7d65bce0bbe3898adef6f008c94752a21932f9f1',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@61b7de3c39f01a0eeb717f444c86990547752e26',
     'condition': 'dawn_standalone',
   },
   'third_party/spirv-headers': {