haskell-vty: disable 'doCheck' because of build errors

Setup: At least the following dependencies are missing:
Cabal ==1.17.*
haskell-hashed-storage: disable 'doCheck' because of test suite errors

running tests
/bin/sh: dist/build/hashed-storage-test/hashed-storage-test: No such file or directory
haskell-sendfile: update to version 0.7.9