[PATCH] [C++11] Add overloads for externally used OwningPtr functions.

[Ahmed Charles]

  That would work, I think. But given that I use MSVC and can't test that, is somewhat of a blocker. :)

  There's also the issue that it would require changes to llvm/clang/lld/lldb all at the same time, since while we could require external users either have 'rvalue references for *this', the build bots will complain if it breaks.

  So, all things considered, overloads are the best solution for the moment.

http://llvm-reviews.chandlerc.com/D2962