Cabal for GHC 7.8

[Manuel M T Chakravarty]

I noticed that the Cabal package doesn’t have a branch for ghc-7.8:

  http://git.haskell.org/packages/Cabal.git

Is that intended? Maybe as a result the instructions at 

  https://ghc.haskell.org/trac/ghc/wiki/Building/GettingTheSources

to check out a branch from the *GitHub mirror repos* doesn’t work either. It fails with

== running git submodule update
Cloning into 'libraries/Cabal'...
fatal: remote error: 
  ghc/packages/Cabal is not a valid repository name
  Email support at github.com for help
Clone of 'git at github.com:ghc/packages/Cabal.git' into submodule path 'libraries/Cabal' failed
git failed: 256 at ./sync-all line 122.

Manuel