[llvm] r211595 - Pass a unique_ptr<MemoryBuffer> to the constructors in the Binary hierarchy.

[Rafael Espíndola]

> On the other hand it looks like you have exactly the same problem as the
> clang frontend in this code because it needlessly unmaps and re-mmaps files
> each time they're used, so why not work together on the solution?

Sorry, where do we have that with ObjectFile?

Cheers,
Rafael