Fix regression in r227409 where we were passing -fsyntax-only
in all cases.

Patch by Artem Belevich.

llvm-svn: 227591
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index ceb6775..512aad2 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -5166,6 +5166,7 @@
     break;
   case types::TY_PP_Asm:
     CmdArgs.push_back("-S");
+    break;
   case types::TY_Nothing:
     CmdArgs.push_back("-fsyntax-only");
     break;