Add libgsasl7-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2236
Add libgsasl7-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#2236

Packages: libgsasl7-dev libgsasl7 gsasl gsasl-dbg

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