Update Haddock submodule.

This splits up Haddock up a bit to allow use of its parser (and in the
future perhaps more) without GHC dependency. It should build fine with
the regular work-flow but if you get problems with building Haddock then
please revert this and let me know.

1 files changed, 0 insertions, 0 deletions

diff --git a/utils/haddock b/utils/haddock
-Subproject dba02d6df32534aac5d257f2d28596238d24894
+Subproject a19af87d6bfee1abc6c179f79eb391b381a26d8