Roll SwiftShader 6e27fea..e2febff

https://swiftshader.googlesource.com/SwiftShader.git/+log/6e27fea..e2febff

BUG=

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: Ia48f19ed5895d22d38799cd13bbb7b42a98b9e52
Reviewed-on: https://chromium-review.googlesource.com/743698Reviewed-by: Alexis Hétu <sugoi@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Alexis Hétu <sugoi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512606}

DEPS

@@ -75,7 +75,7 @@ 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': '6e27fea85f863bcc620761efc678e9ad3e5f6ff4',
+  'swiftshader_revision': 'e2febff0f79aab45451c5d20e59e3b55040f2fa6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.