Roll SwiftShader from f8864349feb1 to 40305f9cd5c7 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/f8864349feb1..40305f9cd5c7

2022-03-16 srisser@google.com Add variable to control regres daily branch
2022-03-16 joshuaduong@google.com Fix integer overflow in vkAllocateMemory.

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

To file a bug in SwiftShader: https://bugs.chromium.org/p/swiftshader/issues/entry
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

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/main/autoroll/README.md

Bug: None
Tbr: enga@google.com
Change-Id: I515b5a05d47437a240bff1757a7019f457534c06
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/83882
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -133,7 +133,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@f8864349feb15ba77bdc20fbefe4d2035410e4af',
+    'url': '{swiftshader_git}/SwiftShader@40305f9cd5c7a823bc3fc7b13780e517286ee49d',
     'condition': 'dawn_standalone',
   },