go/types: exclude a couple of files from the stdlib test that don't parse on Windows.
go/types: exclude a couple of files from the stdlib test that don't parse on Windows.

They use stuff in syscall that doesn't exist on Windows, and this test does not
parse build tags (not that we make that easy) to automatically skip them.

R=golang-dev, r, gri
CC=golang-dev
https://codereview.appspot.com/12453043

tmc/mirror-go.tools,t-yuki/go.tools.old,tmc/mirror-go.tools,t-yuki/go.tools.old,t-yuki/go.tools.old,tmc/mirror-go.tools