textproc/bibutils: 5.0 --> 5.2, support STAGEDIR
lang/ghc: Support STAGEDIR
Implement STAGEDIR support for bsd.cabal.mk consumers
lang/ghc: Fix build on 10.0 and later systems
converters/hs-iconv: Fix build on FreeBSD 10.x
x11-toolkits/hs-wxc: Fix build