Auto merge of #2158 - devnexen:fbsd_update, r=JohnTitor
Auto merge of #2158 - devnexen:fbsd_update, r=JohnTitor

Add `MAP_ALIGNED_SUPER` on FreeBSD

introducing MAP_ALIGNED macro and MAP_ALIGNED_SUPER.

rust-lang/libc,rust-lang/libc,rust-lang/libc