Roll SwiftShader from abe07b943855 to 6f74415e2f74 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/abe07b943855..6f74415e2f74

2020-08-17 amaiorano@google.com Update README to add details on Vulkan and less about GLES
2020-08-17 capn@google.com Don't rely on VectorType::get() default parameter

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/+doc/master/autoroll/README.md

Bug: None
Tbr: cnorthrop@google.com
Change-Id: I7e4f009c36170658f58adee8c944478afea69c69
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2361524
Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -232,7 +232,7 @@ deps = {
   },
 
   'third_party/SwiftShader': {
-    'url': '{swiftshader_git}/SwiftShader@abe07b9438553f741e776dedb59a2d4b502a9983',
+    'url': '{swiftshader_git}/SwiftShader@6f74415e2f74b36784f4a8a08647db405473fbfc',
     'condition': 'not build_with_chromium',
   },