[commit: ghc] wip/bump-cabal: Update `Cabal` submodule (77cffed)

[git at git.haskell.org]

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

On branch  : wip/bump-cabal
Link       : http://ghc.haskell.org/trac/ghc/changeset/77cffedf5fc8b2061e44b37539688a658cacf8f1/ghc

>---------------------------------------------------------------

commit 77cffedf5fc8b2061e44b37539688a658cacf8f1
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Mon Jan 7 00:59:23 2019 +0100

    Update `Cabal` submodule
    
    This also requires adapting `ghc-pkg` to use the new Cabal parsing API
    as the old ReadP-based one has finally been evicted for good.
    
    Hadrian bit finished by: Ben Gamari <ben at smart-cactus.org>


>---------------------------------------------------------------

77cffedf5fc8b2061e44b37539688a658cacf8f1
 ghc.mk                                |   3 -
 hadrian/src/Rules/Register.hs         |  16 ++-
 libraries/Cabal                       |   2 +-
 testsuite/tests/cabal/ghcpkg01.stdout | 246 ++++++++++++++++------------------
 testsuite/tests/cabal/ghcpkg07.stdout |  13 +-
 utils/ghc-cabal/ghc.mk                |  10 +-
 utils/ghc-pkg/Main.hs                 |  51 +++----
 7 files changed, 159 insertions(+), 182 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc 77cffedf5fc8b2061e44b37539688a658cacf8f1