Merge "Enable the experimental LLVM new pass manager"

cc/config/clang.go

@@ -108,6 +108,9 @@ func init() {
 		// Help catch common 32/64-bit errors.
 		"-Werror=int-conversion",
 
+		// Enable the new pass manager.
+		"-fexperimental-new-pass-manager",
+
 		// Disable overly aggressive warning for macros defined with a leading underscore
 		// This happens in AndroidConfig.h, which is included nearly everywhere.
 		// TODO: can we remove this now?