Roll src/third_party/shaderc/src e46010f01da9..0865050e54e9 (2 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/e46010f01da9..0865050e54e9

git log e46010f01da9..0865050e54e9 --date=short --no-merges --format='%ad %ae %s'
2019-11-12 rharrison@google.com Split spvc shader generation into initialize and compile phases (#882)
2019-11-12 9856269+sarahM0@users.noreply.github.com opName - opStruct (#880)

Created with:
  gclient setdep -r src/third_party/shaderc/src@0865050e54e9

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/shaderc-chromium-autoroll
Please CC radial-bots+chrome-roll@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

TBR=radial-bots+chrome-roll@google.com

Bug: None
Change-Id: I62159dec827ab3d973b07f92d2f2230a5315c02d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912928Reviewed-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@{#714833}

DEPS

@@ -299,7 +299,7 @@ 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.
-  'shaderc_revision': 'e46010f01da9b74f63c77576ae3d91b900431073',
+  'shaderc_revision': '0865050e54e93bb1b0f122780246892a1164bb26',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.