build: set owner root for all files on ubifs creation

When creating an image it makes no sense to have files owned by
the uid and gid on the host (and even creates a bug when for
example dropbear authorized_keys is included via env/files).

Signed-off-by: Joris de Vries <joris@apptrician.nl>

SVN-Revision: 38442

include/image.mk

@@ -139,6 +139,7 @@ ifneq ($(CONFIG_TARGET_ROOTFS_UBIFS),)
 			$(if $(CONFIG_TARGET_UBIFS_COMPRESSION_LZO),--force-compr=lzo) \
 			$(if $(CONFIG_TARGET_UBIFS_COMPRESSION_ZLIB),--force-compr=zlib) \
 			--jrn-size=$(CONFIG_TARGET_UBIFS_JOURNAL_SIZE) \
+			--squash-uids \
 			-o $(KDIR)/root.ubifs \
 			-d $(TARGET_DIR)
         endif