TreeSize uses syscall.Stat_t which is not available on Windows.
It's called only on daemon path, therefore extracting it to daemon
with build tag 'daemon'
Signed-off-by: Ahmet Alp Balkan <ahmetb@microsoft.com>
Upstream-commit: b64c9b521ab4e4082ed874a23a493f4a266304d5
Component: engine
