Update Clang in CI

Hoping this will fix MSan in CI, since it picks up the change in
https://github.com/google/sanitizers/issues/1614#issuecomment-2010316781

Change-Id: Iab62caed53ec1d0e9fb1bb39b55af420f9c08c75
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/69130
Reviewed-by: Bob Beck <bbe@google.com>
diff --git a/util/bot/update_clang.py b/util/bot/update_clang.py
index b876921..9c5c52d 100644
--- a/util/bot/update_clang.py
+++ b/util/bot/update_clang.py
@@ -29,8 +29,8 @@
 # CLANG_REVISION and CLANG_SUB_REVISION determine the build of clang
 # to use. These should be synced with tools/clang/scripts/update.py in
 # Chromium.
-CLANG_REVISION = 'llvmorg-19-init-2941-ga0b3dbaf'
-CLANG_SUB_REVISION = 22
+CLANG_REVISION = 'llvmorg-19-init-10646-g084e2b53'
+CLANG_SUB_REVISION = 57
 
 PACKAGE_VERSION = '%s-%s' % (CLANG_REVISION, CLANG_SUB_REVISION)