Roll SwiftShader from f4c21136e60a to 83498ed6d228 (5 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/f4c21136e60a..83498ed6d228

2020-12-09 natsu@google.com Treat AHB YUV as external format
2020-12-09 natsu@google.com Handle AHARDWAREBUFFER_FORMAT_YV12
2020-12-09 srisser@google.com Update SPIR-V version to VK_1_1_SPV_1_4
2020-12-09 natsu@google.com Handle VkExternalFormatANDROID in VkCreateImage
2020-12-09 srisser@google.com Add decorate operations new to SPIR-V 1.4

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-chromium-autoroll
Please CC swiftshader-team+autoroll@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_chromium_msan_rel_ng;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: swiftshader-team+autoroll@google.com
Change-Id: If34e5a1f3191d9e212122e2b5dd0183c5d965e30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583078Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#835489}

DEPS

@@ -215,7 +215,7 @@ 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': 'f4c21136e60a69bed428916f427115a250d0739c',
+  'swiftshader_revision': '83498ed6d22854cd2433e2411e67298e4d2cc0cd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.