git: fix gitweb.cgi runtime dependency on gzip

gitweb.cgi uses gzip for creating "snapshots". Without this patch it
doesn't work.
Merge pull request #472 from bjornfor/git

git: fix gitweb.cgi runtime dependency on gzip
haskell-fclabels: update to version 1.1.6
haskell-zeromq3-haskell: update to version 0.3.1
haskell-shakespeare: patch to fix build with GHC 7.0.4
haskell-pretty-show: add old version 1.2, which still builds fine with GHC 7.0.4