Add libghc-hslogger-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1661
Add libghc-hslogger-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1661

Packages: libghc-hslogger-dev libghc-hslogger-prof libghc-hslogger-doc

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