Roll SwiftShader from 5590857be813 to 9c9608fa94a9 (6 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/5590857be813..9c9608fa94a9

2023-03-20 jif@google.com Add LLVM 16 at commit fce3e75e01ba
2023-03-20 jdapena@igalia.com More C++20 fixes
2023-03-20 hwennborg@google.com Add missing #include <exception> for std::terminate
2023-03-20 jdapena@igalia.com GCC: fix build error due to missing template keyword in GCC 12.
2023-03-20 jdapena@igalia.com Another C++20 fix for GCC
2023-03-20 jdapena@igalia.com GCC: fix build error due to deprecated declarations warning

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

To file a bug in SwiftShader: https://bugs.chromium.org/p/swiftshader/issues/entry
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

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/main/autoroll/README.md

Bug: None
Tbr: jrprice@google.com
Change-Id: Ie46eeeab3b9f20409e109c066065af588c42b410
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/124860
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -137,7 +137,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@5590857be8136e4e7b213787f5b1f197d15bb54e',
+    'url': '{swiftshader_git}/SwiftShader@9c9608fa94a9209f2635c1d821c3652c3fd2a5e8',
     'condition': 'dawn_standalone',
   },