busybox: update bbappend to match update recipe in oe-core

(From meta-openembedded rev: 31acd55435301740b2705e855629184717776ed2)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>

diff --git a/meta-openembedded/meta-oe/recipes-core/busybox/busybox_1.19.3.bbappend b/meta-openembedded/meta-oe/recipes-core/busybox/busybox_1.19.4.bbappend
similarity index 100%
rename from meta-openembedded/meta-oe/recipes-core/busybox/busybox_1.19.3.bbappend
rename to meta-openembedded/meta-oe/recipes-core/busybox/busybox_1.19.4.bbappend