Update to clang-r450784d

This respin contains performance improvements to clang-tidy and lld, and
fp16 cost fixes.

Test: presubmit
Bug: 219872481
Change-Id: I322a680cdc6ebc0f1fe3735ed087477e7f2508fe
diff --git a/cc/config/global.go b/cc/config/global.go
index 65bfbf0..3caf327 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -286,8 +286,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r450784c"
-	ClangDefaultShortVersion = "14.0.5"
+	ClangDefaultVersion      = "clang-r450784d"
+	ClangDefaultShortVersion = "14.0.6"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{