Roll SwiftShader f8374cf..24e7192

https://swiftshader.googlesource.com/SwiftShader.git/+log/f8374cf..24e7192

Bug: 778467

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;luci.chromium.try:android_optional_gpu_tests_rel

Change-Id: I4617e82b69a9b2de877c63f735d8ea461c960e57
Reviewed-on: https://chromium-review.googlesource.com/c/1406132Reviewed-by: Alexis Hétu <sugoi@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622113}

DEPS

@@ -141,7 +141,7 @@ 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': 'f8374cf0e75c0b44782ce903622a9fed1a1d709e',
+  'swiftshader_revision': '24e71928441e008fc49485cc795f578552df5bcc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.