* Add new function winpr_GetTickCount64NS for high resolution tick
count with (up to) nanosecond resolution
* Add new function winpr_GetUnixTimeNS for high resolution system time
as nanoseconds since 1.1.1970
* Replace use of clock_gettime and gettimeofday in whole project with
these new functions
* Add new macros WINPR_TIME_NS_TO_* and WINPR_TIME_NS_REM_* to convert
the nano second count to less resolution or get the remainder in the
desired resolution
