Update clang to r344140

Bug: 111759196
Test: Test various targets in AOSP and internal branches.
      For Googlers, go/clang-r344140-testing
Change-Id: I70fc5a2824de698d78c95ce2acd42eff9c5ebe15
diff --git a/cc/config/clang.go b/cc/config/clang.go
index 74e8ae8..0f22034 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -129,6 +129,9 @@
 		// Warnings from clang-7.0
 		"-Wno-deprecated-register",
 		"-Wno-sign-compare",
+
+		// Warnings from clang-8.0
+		"-Wno-defaulted-function-deleted",
 	}, " "))
 
 	pctx.StaticVariable("ClangExtraCppflags", strings.Join([]string{