Make sdimg depend on native mtools.
Make sdimg depend on native mtools.

We need it because we use mcopy.

GregorioDiStefano/meta-mender,bboozzoo/meta-mender,bboozzoo/meta-mender,GregorioDiStefano/meta-mender,bboozzoo/meta-mender,bboozzoo/meta-mender,GregorioDiStefano/meta-mender