Add a forgotten break. Found by Rafael Espindola!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118433 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/ToolChains.cpp

@@ -1110,6 +1110,7 @@ Tool &FreeBSD::SelectTool(const Compilation &C, const JobAction &JA) const {
         T = new tools::ClangAs(*this);
       else
         T = new tools::freebsd::Assemble(*this);
+      break;
     case Action::LinkJobClass:
       T = new tools::freebsd::Link(*this); break;
     default: