Balloon: force SWAP_OUT to match SWAP_IN
Balloon: force SWAP_OUT to match SWAP_IN

There is no clean 'pagefile read' counter on Windows.
SWAP_IN uses PageReadCount counter, which includes reads from pagefile,
reads from memory-mapped files (both cached and non-cached) and
prefetching reads (including superfetch).

So SWAP_OUT should include mapped writes as well as dirty writes.
Then these two counters will be 'matched by sources'.

This is not mentioned in MSDN. Here is a brief research report
as a proof (w2k12r2):
PageReadIoCout/PageReadCount are updated in MiWaitForInPageComplete,
which is called both from MiIssueHardFault and MiPfCompletePrefetchIos.
Last one is called from MiPrefetchVirtualMemory,
MmWaitForCacheManagerPrefetch, MiPrefetchControlArea and MmPrefetchPages.

Signed-off-by: Alexey V. Kostyushko <5105da7b3e86aa439d522a449d61c4e5f09a8b69@virtuozzo.com>
Signed-off-by: Denis V. Lunev <0e1ddfe761f44f291037b4efb98a5f5f36ee23b3@openvz.org>

gnif/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,YanVugenfirer/virtio-win-arm,ladipro/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,gnif/kvm-guest-drivers-windows,YanVugenfirer/virtio-win-arm,virtio-win/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,vrozenfe/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,ladipro/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,YanVugenfirer/virtio-win-arm,YanVugenfirer/kvm-guest-drivers-windows,daynix/kvm-guest-drivers-windows,YanVugenfirer/kvm-guest-drivers-windows,virtio-win/kvm-guest-drivers-windows,YanVugenfirer/virtio-win-arm,virtio-win/kvm-guest-drivers-windows