enable ps stats collection on Windows
enable ps stats collection on Windows

Change-Id: I5153d07ff35612c1d4e9003c099eff52ec4eea85
Reviewed-on: http://review.couchbase.org/42455
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>
Tested-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>

vmx/perfrunner,EricACooper/perfrunner,hsharsha/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,mikewied/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,EricACooper/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,couchbase/perfrunner,hsharsha/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,thomas-couchbase/perfrunner,vmx/perfrunner,dkao-cb/perfrunner,thomas-couchbase/perfrunner,mikewied/perfrunner,PaintScratcher/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,PaintScratcher/perfrunner,dkao-cb/perfrunner,pavel-paulau/perfrunner