#include <mach/sync.h> not included by <mach/mach.h> — include it explicitly

mach/sync.h

* This file contains compatibilty wrapper header for things that used * to be generated from mach/sync.defs. Now that code is split into two * different interface generator files, so include the two resulting * headers here.

This header declares nothing itself under the arm64 configuration; it groups the headers below.

mach/semaphore.hForward Declarations