contrib: move patchers to contrib/kernel-tree

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

kernel-tree-scripts/create-patch.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+WG="$(readlink -f "$(dirname "$(readlink -f "$0")")/../../src/")"
+
+for i in "$WG"/*.c "$WG"/*.h "$WG"/crypto/*.c "$WG"/crypto/*.h "$WG"/crypto/*.S "$WG"/Kbuild "$WG"/Kconfig; do
+	diff -u /dev/null "$i" | sed "s:${WG}:b/net/wireguard:;s:Kbuild:Makefile:"
+done
+
+cat <<_EOF
+--- a/net/Kconfig
++++ b/net/Kconfig
+@@ -85,1 +85,2 @@ config INET
+ if INET
++source "net/wireguard/Kconfig"
+--- a/net/Makefile
++++ b/net/Makefile
+@@ -8,1 +8,2 @@
+ obj-\$(CONFIG_NET)		:= socket.o core/
++obj-\$(CONFIG_WIREGUARD)		+= wireguard/
+_EOF

kernel-tree-scripts/jerry-rig.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 K="$1"
-WG="$(readlink -f "$(dirname "$(readlink -f "$0")")/../src/")"
+WG="$(readlink -f "$(dirname "$(readlink -f "$0")")/../../src/")"
 
 if [[ ! -e $K/net/Kconfig ]]; then
 	echo "You must specify the location of kernel sources as the first argument." >&2