Update cabal submodule to 1.22.5

For 7.10.3, this will fold in a critical fix for Mac (the Cabal side of #10568 (closed)), along with a fix to prevent c-sources from being recompiled unnecessarily (a big deal when working with large C/C++ bindings).

The commit is fb7ce39

https://github.com/haskell/cabal/tree/1.22