Add libfftw3-3 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3723
Add libfftw3-3 to ubuntu-trusty; resolves travis-ci/apt-package-whitelist#3723

Packages: libfftw3-3 libfftw3-single3 libfftw3-double3 libfftw3-long3 libfftw3-quad3 libfftw3-bin libfftw3-dev libfftw3-doc libfftw3-dbg

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