Remove some references to deprecated -fglasgow-exts in user's guide
Update to latest Cabal 1.18 branch tip

This update pulls in the fix for #8266

(recommended add-on reading for those interested in OSX linker peculiarities:
https://github.com/haskell/cabal/issues/1660#issuecomment-33701508 )

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
(cherry picked from commit 5671ad66b8c938939a44c883002caa4e13be098c)
Bump version to 7.8.1

The version for RC2 will appear as '7.8.1.<date>'

Signed-off-by: Austin Seipp <aseipp@pobox.com>
That should have been 7.8.0

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Merge 'upstream/ghc-7.8' into ghc-7.8