Roll SwiftShader f120c92..b04881b

https://swiftshader.googlesource.com/SwiftShader.git/+log/f120c92..b04881b

BUG=

TBR=kbr@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_chromium_cfi_rel_ng;luci.chromium.try:android_optional_gpu_tests_rel

Change-Id: I4fd8a16f02cfcbf5a5b45a604e93d0ee43b525ba
Reviewed-on: https://chromium-review.googlesource.com/973381Reviewed-by: Alexis Hétu <sugoi@chromium.org>
Commit-Queue: Alexis Hétu <sugoi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544779}

DEPS

@@ -99,7 +99,7 @@ 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': 'f120c92a4e7b4ee954cfb96171f9e4ff97b6cc9e',
+  'swiftshader_revision': 'b04881b856b90984a54c9d370f2d5e04d6383cc1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.