SystemTools: Touch with better than 1s resolution if possible

On Windows use CreateFile (with FILE_FLAG_BACKUP_SEMANTICS so it works
for directories), GetSystemTimeAsFileTime, and SetFileTime to touch.  On
other platforms prefer utimensat, then utimes, then utime.

Change-Id: Ie85fe3766661803e66f39975a147cd6f7320ea59
CMake-Issue: 14020