package/docker-engine: fix unmet dependencies

Properly propagate dependencies from docker-containerd to fix the
following unmet dependencies:

    warning: (BR2_PACKAGE_DOCKER_ENGINE_DAEMON) selects
    BR2_PACKAGE_DOCKER_CONTAINERD which has unmet direct dependencies
    (BR2_PACKAGE_HOST_GO_ARCH_SUPPORTS &&
    BR2_PACKAGE_HOST_GO_CGO_LINKING_SUPPORTS && BR2_TOOLCHAIN_HAS_THREADS &&
    BR2_USE_MMU && BR2_USE_WCHAR)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/docker-engine/Config.in

@@ -13,6 +13,7 @@ if BR2_PACKAGE_DOCKER_ENGINE
 
 config BR2_PACKAGE_DOCKER_ENGINE_DAEMON
 	bool "docker daemon"
+	depends on BR2_USE_MMU # docker-containerd
 	depends on BR2_USE_WCHAR # docker-containerd
 	select BR2_PACKAGE_DOCKER_CONTAINERD # runtime dependency
 	select BR2_PACKAGE_SQLITE # runtime dependency