Portage/GHCCore.hs: added support for ghc-7.6.2

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
point to own cabal fork
submodule update
submodule update
cabal submodule update
cabal submodule update
Warning-dirven Code-Maid
submoule update: forbid cabal to self update