syscall: remove terminating \r and \n from windows error messages
syscall: remove terminating \r and \n from windows error messages

R=rsc, peterGo
CC=golang-dev
http://codereview.appspot.com/3095042

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