trac Trac #9744, make program name and product version configurable through DynFlags/Settings
This allows GHC API clients to use a package database and dynamic
library names that do not clash with those of the host GHC
This also updates the Haddock submodule.
Reviewers: hvr, austin
Reviewed By: austin
Subscribers: thomie, carter
Differential Revision: https://phabricator.haskell.org/D496