mtd: mkfs.jffs2 requires zlib to build

[Peter: lzo needed as well]
Signed-off-by: Will Wagner <will_wagner@carallon.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/mtd/mtd.mk

@@ -6,6 +6,9 @@
 MTD_VERSION:=1.3.1
 MTD_SOURCE:=mtd-utils-$(MTD_VERSION).tar.bz2
 MTD_SITE:=ftp://ftp.infradead.org/pub/mtd-utils
+ifeq ($(BR2_PACKAGE_MTD_MKFSJFFS2),y)
+MTD_DEPENDENCIES = zlib lzo
+endif
 
 HOST_MTD_DEPENDENCIES = host-lzo host-e2fsprogs