build: fix IGNORE_ERRORS for sources packages that match both 'y' and 'm'

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37405 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: sctp depends on ipv6 if ipv6 is enabled

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37406 3c298f89-4303-0410-b956-a3cf2f4a3e73