Changes to ghc(2)

Changes to ghc:
commit ac31b79924e9330c577ea63af9b0f10f4fc6c8f6
Author: Patrick Palka <patrick@parcs.ath.cx>
Date:   Sun Dec 1 12:47:33 2013 -0500

    Move the LDV code below the self-loop label (#8275)

commit 6178f6e162a3a2f2e9f7103d7ca94bbed16b39ec
Author: Patrick Palka <patrick@parcs.ath.cx>
Date:   Sun Dec 1 12:44:14 2013 -0500

    Don't explicitly refer to nodeReg in ldvEnterClosure