Roll src/third_party/swiftshader/ 155f802a6..4169b3109 (4 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/155f802a6be3..4169b31090db

$ git log 155f802a6..4169b3109 --date=short --no-merges --format='%ad %ae %s'
2018-11-05 tikuta Fix for unused-lambda-capture warning
2018-11-05 gordana.cmiljanovic [MIPS] Add support for 64b MIPS architecture
2018-11-03 tikuta Revert "Fix for unused-lambda-capture warning"
2018-10-23 tikuta Fix for unused-lambda-capture warning

Created with:
  roll-dep src/third_party/swiftshader

Bug: 681136
Change-Id: I74a53ae11edbd50fb69c95764a7c77dc54b473c1
Reviewed-on: https://chromium-review.googlesource.com/c/1318511Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605754}

DEPS

@@ -136,7 +136,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.
-  'swiftshader_revision': '155f802a6be3720a0176bc1674b5af3b5b6e31f9',
+  'swiftshader_revision': '4169b31090dbe7d48b3e053c571c12414089bf28',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.