Add dev-lang/purescript.

I fixed a dependency to haskeline by hand. In version 0.6, the .cabal
file will be fixed so auto-generated ebuild will work well.

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
Merge pull request #323 from omasanori/purescript

Add dev-lang/purescript.
dev-lang/jhc: bump up to 0.8.1

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-lang/jhc: added missing manifest

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>