Roll src/third_party/SPIRV-Tools/src de797ddcb5d0..aab6f4073f7e (2 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/de797ddcb5d0..aab6f4073f7e


git log de797ddcb5d0..aab6f4073f7e --date=short --no-merges --format='%ad %ae %s'
2018-12-07 stevenperron@google.com Add documentation for licm option to the spirv-opt help. (#2179)
2018-12-07 stevenperron@google.com Fix invalid OpPhi generated by merge-return. (#2172)


Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@aab6f4073f7e

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: I47d37bb50531ec8b70a05f423847048367284c84
Reviewed-on: https://chromium-review.googlesource.com/c/1368166Reviewed-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@{#614804}

DEPS

@@ -222,7 +222,7 @@ 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': 'de797ddcb5d0a8b51c850e67ef2959f509953229',
+  'spv_tools_revision': 'aab6f4073f7e77794dc40749ccf0c493b883df5e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.