Add libreadline6 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2303
Add libreadline6 to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2303

Packages: libreadline6 lib64readline6 readline-common libreadline-dev libreadline6-dev lib64readline6-dev libreadline6-dbg rlfe lib32readline6 lib32readline6-dev readline-doc

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