Roll SwiftShader 3e2b109..a0aa5fd

https://swiftshader.googlesource.com/SwiftShader.git/+log/3e2b109..a0aa5fd

BUG=769026

TBR=kbr@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel,linux_chromium_cfi_rel_ng;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Change-Id: I9ddaa99728b00be85f8759f975d4fb85161e3d77
Reviewed-on: https://chromium-review.googlesource.com/803794
Commit-Queue: Alexis Hétu <sugoi@chromium.org>
Reviewed-by: Alexis Hétu <sugoi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521087}

DEPS

@@ -94,7 +94,7 @@ 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': '3e2b10936c5304477fdadfa233671738008fe154',
+  'swiftshader_revision': 'a0aa5fdeee12bc42616fe13ef3ea62edb1b9f166',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.