patch applied (ghc-nightly): change $PUBLISH_CP != " scp" tests to $PUBLISH_CP = " cp"

[Simon Marlow]

Tue Oct 10 07:14:26 PDT 2006  Simon Marlow <simonmar at microsoft.com>
  * change  $PUBLISH_CP != "scp"  tests to  $PUBLISH_CP = "cp"
  So that we can set $PUBLISH_CP to rsync, which appears to otherwise
  work fine, transferring the bits over ssh.

    M ./bin/nightly-wrk -3 +3