Update clang version to clang-r468909b

Bug: http://b/241011085
Bug: http://b/235405318
Test: Builds
Change-Id: Ib415277284fc69f5a6b59b6998f6cdbcaefdd13e
diff --git a/cc/config/global.go b/cc/config/global.go
index bf80907..4e4d174 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -312,8 +312,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r468909"
-	ClangDefaultShortVersion = "15.0.2"
+	ClangDefaultVersion      = "clang-r468909b"
+	ClangDefaultShortVersion = "15.0.3"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{