Files that are suffixed with `_linux.go` or `_windows.go` are
already only built on Linux / Windows, so these build-tags
were redundant.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This fix tries to fix wrong CPU count after CPU hot-plugging.
On windows, GetProcessAffinityMask has been used to probe the
number of CPUs in real time.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
