Add ghc-8.0.1 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2145
Add ghc-8.0.1 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2145

Packages: ghc-8.0.1 ghc-8.0.1-prof ghc-8.0.1-dyn ghc-8.0.1-htmldocs

travis-ci/apt-package-whitelist,travis-ci/apt-package-whitelist