[lld] r219843 - [mach-o] avoid overly clever std::find_if

[Tim Northover]

> This change does seem to contain functionality changes.

> In order to fix the buildbot breakage, the change to MachO/CompactUnwindPass.cpp should suffice.
> 
> You just mixed two changes?

Yes, sorry about that. I've no idea what happened: I even remember writing the commit message for that second one.

Basically, it's going to be needed when lld starts removing unused __eh_frame entries, and even before then it makes the atom graph more consistent between different architectures.

Tim.