Add libpcre3 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3477
Add libpcre3 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3477

Packages: libpcre3 libpcre3-udeb udeb libpcrecpp0 libpcre3-dev libpcre3-dbg pcregrep

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