Add elfutils to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3650
Add elfutils to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3650

Packages: elfutils libelf1 libelf-dev libdw-dev libdw1 libasm1 libasm-dev

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