Roll SwiftShader 99be318..bf58b9

https://swiftshader.googlesource.com/SwiftShader.git/+log/99be318..bf58b9

BUG=

TBR=kbr@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=luci.chromium.try: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: I5964f90bad824754fc3d6b4354ec13d9cbad643c
Reviewed-on: https://chromium-review.googlesource.com/1028250Reviewed-by: Alexis Hétu <sugoi@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553828}

DEPS

@@ -110,7 +110,7 @@ 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': '99be318ada3194e93d883a11c433fbea02ceb992',
+  'swiftshader_revision': 'bf58b98950f4248f819bf3b2eaaf04b8663f4504',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.