Dockerfile: install dependencies for Yocto 2.7
Dockerfile: install dependencies for Yocto 2.7

Added host dependencies needed for building Yocto "Warrior" 2.7.

Signed-off-by: Oleksandr Kravchuk <da66fcdb9815331ae441a2bc352cef73cf081e1e@pelagicore.com>

Pelagicore/pelux-manifests,sashko/pelux-manifests