[commit: packages/unix] ghc-7.8's head updated: Update changelog and prepare for 2.7.0.1 release (dc0e771)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/unix

Branch 'ghc-7.8' now includes:

     dc0e771 Update changelog and prepare for 2.7.0.1 release