Roll third_party/SwiftShader 22d73d15e778..6c11cf2ad9ca (5 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/22d73d15e778..6c11cf2ad9ca

git log 22d73d15e778..6c11cf2ad9ca --date=short --first-parent --format='%ad %ae %s'
2020-03-24 capn@google.com Remove unused sampler parameter
2020-03-24 capn@google.com Specialize sampling routine for immutable sampler data
2020-03-23 amaiorano@google.com CMake: make SWIFTSHADER_DCHECK_ALWAYS_ON work on Windows
2020-03-23 chrisforbes@google.com Refactor vertex fetch to use VkFormat more aggressively
2020-03-23 bclayton@google.com Merge changes I2b7adc3c,I5873dfa8

Created with:
  gclient setdep -r third_party/SwiftShader@6c11cf2ad9ca

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 cnorthrop@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: cnorthrop@google.com
Change-Id: I301e41b5044c90f43228d8b01fb6d26ae249fee6
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2117476
Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 35e28b2..8cadf75 100644
--- a/DEPS
+++ b/DEPS
@@ -182,7 +182,7 @@
   },
 
   'third_party/SwiftShader': {
-    'url': '{swiftshader_git}/SwiftShader@22d73d15e778a4c8dda5a141c0da4dc10f4d8bf3',
+    'url': '{swiftshader_git}/SwiftShader@6c11cf2ad9ca86db1372a74db59ba19a0c957ed7',
     'condition': 'not build_with_chromium',
   },