dev-haskell/cabal: added experimental 1.18-rc2

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
loosen quickcheck test dep in opencl
dev-haskell/cabal: rename 1.18-rc2 to arbitrary 1.17.100 to unbreak our default installed cabal logic

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/cabal-1.17.100.ebuild: fix SRC_URI

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/cprng-aes: mask as revdeps should be fixed