Unbreak gcmole bots.

Switching on C++11 features for gcmole might actually be a good idea... :-}

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/452073002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22991 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/gcmole/gcmole.lua

@@ -98,7 +98,7 @@ local function MakeClangCommandLine(plugin, plugin_args, triple, arch_define)
      end
      plugin_args = " " .. table.concat(plugin_args, " ")
    end
-   return CLANG_BIN .. "/clang++ -c "
+   return CLANG_BIN .. "/clang++ -std=c++11 -c "
       .. " -Xclang -load -Xclang " .. CLANG_PLUGINS .. "/libgcmole.so"
       .. " -Xclang -plugin -Xclang "  .. plugin
       .. (plugin_args or "")