dev-haskell/hdevtools: version bump up to 0.1.0.6 (for real)

Pinned pachage ghc versions.
Should fix
Github-bug: https://github.com/gentoo-haskell/gentoo-haskell/issues/351
Reported-by: Javran
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>