[Issue 19427] Add core.sys.posix.unistd & core.sys.posix.sys.types definitions for OpenBSD

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19427

Nathan S. <n8sh.secondary at hotmail.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |LATER

--- Comment #1 from Nathan S. <n8sh.secondary at hotmail.com> ---
Rather than making individual issues for each header, will do all together.

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