binary_rootfs: fix chmod of squashfs image only being applied when using chroot

Perhaps it is unnecessary in the other case, but not harm applying
in both to be certain.

Gbp-Dch: Short
Closes: #952850

scripts/build/binary_rootfs

@@ -403,8 +403,6 @@ case "${LB_CHROOT_FILESYSTEM}" in
 					# Removing depends
 					Remove_package
 				fi
-
-				chmod 0644 binary/${INITFS}/filesystem.squashfs
 				;;
 
 			false)
@@ -419,6 +417,8 @@ case "${LB_CHROOT_FILESYSTEM}" in
 				;;
 		esac
 
+		chmod 0644 binary/${INITFS}/filesystem.squashfs
+
 		# Saving cache
 		Save_cache cache/packages.binary
 		;;