gitlab-ci.yml: Use libvdeplug-dev to compile-test the VDE network backend The libvdeplug-dev package is required to compile-test net/vde.c. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20191016131002.29663-1-thuth@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>