Make sdimg depend on native dosfstools.
Make sdimg depend on native dosfstools.

We need it because we use mkfs.vfat.

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