[Issue 13263] phobos/posix.mak has incorrect dependencies

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13263

--- Comment #2 from Andrei Alexandrescu <andrei at erdani.com> ---
Such small issues tend to compound into bigger ones. I think we need to fix
this. We could make phobos dependent on the actual druntime library, or just
not list it as a dependency. Thoughts?

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