target/ubifsroot: mark as broken

It should get fixed to use mkfs.ubifs from mtd-utils, but that's
probably unrealistic before the 2009.05 release, so mark as broken
for now.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

target/ubifs/Config.in

@@ -1,5 +1,6 @@
 config BR2_TARGET_ROOTFS_UBIFS
 	bool "ubifs root filesystem"
+	depends on BROKEN # upstream git gone, should use mtd-utils
 	select BR2_HOST_FAKEROOT
 	help
 	  Build a ubifs root filesystem