Roll third_party/SwiftShader 2cb1db08e5f1..11cb891a01a2 (4 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/2cb1db08e5f1..11cb891a01a2

git log 2cb1db08e5f1..11cb891a01a2 --date=short --first-parent --format='%ad %ae %s'
2020-01-18 capn@google.com Rename multiSampledBresenham to enableMultiSampling
2020-01-18 capn@google.com Take advantage of return value optimization
2020-01-17 capn@google.com Enable filtering of YCbCr formats
2020-01-17 capn@google.com Rename createBlend4 to createShuffle4

Created with:
  gclient setdep -r third_party/SwiftShader@11cb891a01a2

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-angle-autoroll
Please CC jonahr@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

Bug: None
Tbr: jonahr@google.com
Change-Id: I73bb1cd83295792565ba95f6bf8f43cb21984cc5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2010492
Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

Author: angle-autoroll

DEPS

@@ -188,7 +188,7 @@ deps = {
   },
 
   'third_party/SwiftShader': {
-    'url': '{swiftshader_git}/SwiftShader@2cb1db08e5f1be1fbfd9847800515caa5fc1dfb0',
+    'url': '{swiftshader_git}/SwiftShader@11cb891a01a2b47cc2135ef19ca18046662476e0',
     'condition': 'not build_with_chromium',
   },