Incorrectly added `-lc++` flag to `Tests` scheme

[jhen0409]

I'm using this plugin to upgrade xcodeproj file, but it seems will add -lc++ flag to Tests scheme.

Use rnpm upgrade, it will add lc++ to Tests scheme.
Use react-native upgrade, It will add lc++ to right place.

[Kureev]

cc @grabbou

[grabbou]

Yeah, good catch! In fact we have discarded rnpm upgrade in the meantime as it turns out the react-native upgrade does all these things for us!

I don't think this is harmful side-effect, esp. that you have to add it anyway when using SnapshotTests or other React-related code in that target.

Sorry for the inconvenience!