8081843: (fs) FileStore.getTotalSpace returns unexpected results with >2TB file systems
Summary: On Mac OS X use statfs() instead of statvfs().
Reviewed-by: alanb
8087288: File.get{Free,Total,Usable}Space may return unexpected results with >2TB file systems
Summary: On Mac OS X replace statvfs64() and struct statvfs64 with statfs() and struct statfs, respectively, and f_frsize with f_bsize.
Reviewed-by: alanb