Implemented osx HR clock using mach_absolute_time
Implemented osx HR clock using mach_absolute_time


Former-commit-id: c0783504af9e142e654feea2f9e908d351044ad4
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide