Revert "Use 'check' on windows"
Revert "Use 'check' on windows"

This reverts commit 55209fe970b1a103f151e160546332e4308c0eb3.

Conflicts:
	master/master.cfg

rust-lang/rust-buildbot,aidanhs/rust-buildbot,rust-lang-deprecated/rust-buildbot,edunham/rust-buildbot,rust-lang/rust-buildbot,edunham/rust-buildbot,aidanhs/rust-buildbot,edunham/rust-buildbot,rust-lang-deprecated/rust-buildbot,aidanhs/rust-buildbot,rust-lang-deprecated/rust-buildbot,rust-lang/rust-buildbot