Switch to clang-r412851 (build 7141649)

Bug: 179065588
Test: presubmit
Change-Id: Ifb9399e9f4ec0968b174b90c1a1f4f78f903d39d
diff --git a/cc/config/global.go b/cc/config/global.go
index ee41125..e60bb3d 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -144,8 +144,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r407598b"
-	ClangDefaultShortVersion = "12.0.2"
+	ClangDefaultVersion      = "clang-r412851"
+	ClangDefaultShortVersion = "12.0.3"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{