Confused about the sub-modules

[Edward Z. Yang]

I *just* pushed a Cabal submodule update, so Erik probably hadn't
gotten it.

Excerpts from Ben Gamari's message of 2016-12-21 14:14:37 -0500:
> Erik de Castro Lopo <mle+hs at mega-nerd.com> writes:
> 
> > Edward Z. Yang wrote:
> >
> >> Not any more. The commit just has to exist in the remote repo (that's
> >> what the lint checks.)
> >
> > So this is where I am running into trouble. Everything for process 
> > and directory is fine, but for Cabal and containers, the git repo
> > on git.haskell.org is missing the commits I need.
> >
> Hmm, what in particular is missing? Cabal seems up-to-date (both
> git.haskell.org:packages/Cabal and github.com/haskell/Cabal master
> branches point to 09865f60caa55a7b02880f2a779c9dd8e1be5ac0). As does
> containers (both point to 71c64747120c3cd1b91f06731167009b0e5b2454).
> 
> In general all of this should be reasonably automatic. However, when
> upstreams push non-fast-forward updates to their branches a bit of
> manual intervention is necessary; if in doubt just ask as you've done
> here.
> 
> Cheers,
> 
> - Ben