Add completions for zsh
Add completions for zsh

Completion for:
qibuild get-licenses
qibuild make-host-tools
qibuild set-host-config
qibuild sourceme

Change-Id: Ic969930fe323eb86aa39ee9346dcd76bb3bad2fb
Reviewed-on: http://gerrit.aldebaran.lan/66525
Tested-by: gerrit
Reviewed-by: ncornu <13ba26b8f12d26c819f48749c65f2f7f5c1d13db@aldebaran.com>

aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild