include/package.mk: Add support for src-checkout/ folder
drwxr-xr-x - 802
drwxr-xr-x - 8021q
drwxr-xr-x - 9p
-rw-r--r-- 9560 Kconfig
-rw-r--r-- 1764 Makefile
-rw-r--r-- 2239 TUNABLE
drwxr-xr-x - appletalk
drwxr-xr-x - atm
drwxr-xr-x - ax25
drwxr-xr-x - bluetooth
drwxr-xr-x - bridge
drwxr-xr-x - can
-rw-r--r-- 24576 compat.c
drwxr-xr-x - core
drwxr-xr-x - dcb
drwxr-xr-x - dccp
drwxr-xr-x - decnet
drwxr-xr-x - dsa
drwxr-xr-x - econet
drwxr-xr-x - ethernet
drwxr-xr-x - ieee802154
drwxr-xr-x - ipv4
drwxr-xr-x - ipv6
drwxr-xr-x - ipx
drwxr-xr-x - irda
drwxr-xr-x - iucv
drwxr-xr-x - key
drwxr-xr-x - lapb
drwxr-xr-x - llc
drwxr-xr-x - mac80211
drwxr-xr-x - netfilter
drwxr-xr-x - netlabel
drwxr-xr-x - netlink
drwxr-xr-x - netrom
-rw-r--r-- 528 nonet.c
drwxr-xr-x - packet
drwxr-xr-x - phonet
drwxr-xr-x - rds
drwxr-xr-x - rfkill
drwxr-xr-x - rose
drwxr-xr-x - rxrpc
drwxr-xr-x - sched
drwxr-xr-x - sctp
-rw-r--r-- 77912 socket.c
drwxr-xr-x - sunrpc
-rw-r--r-- 3074 sysctl_net.c
drwxr-xr-x - tipc
drwxr-xr-x - unix
drwxr-xr-x - wanrouter
drwxr-xr-x - wimax
drwxr-xr-x - wireless
drwxr-xr-x - x25
drwxr-xr-x - xfrm