Mark almost all Haskell ports for expiration by mid April

Ports for Haskell *libraries* are going to be removed from the ports tree.
Haskell *applications* are going to be statically linked with all dependencies
( https://reviews.freebsd.org/D19730 ), so there is no reason to keep
Haskell libraries in tree.

If you think a port is wrongly marked and should stay, please contact haskell@

Submitted by: arrowd
Differential Revision: https://reviews.freebsd.org/D19244