[Bug libstdc++/49204] [C++0x] remaining issues in <future>

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49204
Bug 49204 depends on bug 51617, which changed state.

Bug 51617 Summary: [C++0x] async(f) isn't.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51617

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED