kernel: add missing changes to 220-gc_sections.patch that were accidentally dropped during porting to 3.13

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39458 3c298f89-4303-0410-b956-a3cf2f4a3e73