Merge "Call clang-tidy with -quiet unless WITH_TIDY is set."

cc/tidy.go

@@ -77,6 +77,11 @@ func (tidy *tidyFeature) flags(ctx ModuleContext, flags Flags) Flags {
 		flags.TidyFlags = append(flags.TidyFlags, headerFilter)
 	}
 
+	// If clang-tidy is not enabled globally, add the -quiet flag.
+	if !ctx.Config().ClangTidy() {
+		flags.TidyFlags = append(flags.TidyFlags, "-quiet")
+	}
+
 	// We might be using the static analyzer through clang tidy.
 	// https://bugs.llvm.org/show_bug.cgi?id=32914
 	flags.TidyFlags = append(flags.TidyFlags, "-extra-arg-before=-D__clang_analyzer__")