Add libsrtp0-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1536
Add libsrtp0-dev to ubuntu-precise; resolves travis-ci/apt-package-whitelist#1536

Packages: libsrtp0-dev libsrtp0 srtp-docs srtp-utils

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