Revert "Roll src/third_party/SPIRV-Tools/src 7f1a020abc82..464111eaef80 (1 commits)"

This reverts commit 9912353f.

Reason for revert: the roll breaks compare_build_artifacts crbug/926354

Original change's description:
> Roll src/third_party/SPIRV-Tools/src 7f1a020abc82..464111eaef80 (1 commits)
> 
> https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/7f1a020abc82..464111eaef80
> 
> 
> git log 7f1a020abc82..464111eaef80 --date=short --no-merges --format='%ad %ae %s'
> 2019-01-29 stevenperron@google.com Remove use of deprecated googletest macro (#2286)
> 
> 
> Created with:
>   gclient setdep -r src/third_party/SPIRV-Tools/src@464111eaef80
> 
> The AutoRoll server is located here: https://autoroll.skia.org/r/spirv-tools-chromium-autoroll
> 
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
> 
> If the roll is causing failures, please contact the current sheriff, who should
> be CC'd on the roll, and stop the roller if necessary.
> 
> 
> TBR=dsinclair@chromium.org
> 
> Change-Id: If37766e89c0fd21f4ddab20db4545feee1c0545d
> Reviewed-on: https://chromium-review.googlesource.com/c/1445791
> Reviewed-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@{#627391}

TBR=dsinclair@chromium.org,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: Iaa751145328372a9fb636f5a19d362eafca9dbe8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/1446211Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#627405}

DEPS

@@ -229,7 +229,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'spv_tools_revision': '464111eaef80c4951e63473bc1c9e072f8d33588',
+  'spv_tools_revision': '7f1a020abc82e73576147d344607034825bea18a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.