host-genimage: add host-mtools to dependency list

The mcopy command is needed to generate vfat images.
This previously worked because the host had this probably installed via
package manager.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>

package/genimage/genimage.mk

@@ -7,7 +7,7 @@
 GENIMAGE_VERSION = 9
 GENIMAGE_SOURCE = genimage-$(GENIMAGE_VERSION).tar.xz
 GENIMAGE_SITE = https://github.com/pengutronix/genimage/releases/download/v$(GENIMAGE_VERSION)
-HOST_GENIMAGE_DEPENDENCIES = host-pkgconf host-libconfuse
+HOST_GENIMAGE_DEPENDENCIES = host-pkgconf host-libconfuse host-mtools
 GENIMAGE_LICENSE = GPL-2.0
 GENIMAGE_LICENSE_FILES = COPYING