runtime/pprof: enable test on windows
runtime/pprof: enable test on windows

R=alex.brainman
CC=golang-dev
http://codereview.appspot.com/5047045

Committer: Alex Brainman <54ba58c8441b5eff861de6b4e5ee46baf086b142@gmail.com>
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go