Fix warning about unhandled enumeration in switch.

llvm-svn: 335702
diff --git a/clang/lib/Driver/ToolChains/FreeBSD.cpp b/clang/lib/Driver/ToolChains/FreeBSD.cpp
index 9626ea9..d3d82e4 100644
--- a/clang/lib/Driver/ToolChains/FreeBSD.cpp
+++ b/clang/lib/Driver/ToolChains/FreeBSD.cpp
@@ -198,6 +198,8 @@
     else
       CmdArgs.push_back("elf64ltsmip_fbsd");
     break;
+  default:
+    break;
   }
 
   if (Arg *A = Args.getLastArg(options::OPT_G)) {