[source] kernel: fix build of kmod-udptunnel4 and kmod-udptunnel6

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=1d15a96b29dcd0947690951a7c36aead79a27129

commit 1d15a96b29dcd0947690951a7c36aead79a27129
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Sat Jul 2 18:03:56 2016 +0200

    kernel: fix build of kmod-udptunnel4 and kmod-udptunnel6
    
    The kernel config option CONFIG_NET_UDP_TUNNEL is not visible and can
    not directly be activated. When kmod-udptunnel4 or kmod-udptunnel6 are
    build these packages could be empty when no other kernel module selects
    CONFIG_NET_UDP_TUNNEL.
    
    Reported-by: Baptiste Jonglez <baptiste at bitsofnetworks.org>
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 .../generic/patches-3.18/263-udp_tunnel_kconfig_hack.patch    | 11 +++++++++++
 .../generic/patches-4.1/263-udp_tunnel_kconfig_hack.patch     | 11 +++++++++++
 .../generic/patches-4.4/263-udp_tunnel_kconfig_hack.patch     | 11 +++++++++++
 3 files changed, 33 insertions(+)

diff --git a/target/linux/generic/patches-3.18/263-udp_tunnel_kconfig_hack.patch b/target/linux/generic/patches-3.18/263-udp_tunnel_kconfig_hack.patch
new file mode 100644
index 0000000..e8fb296
--- /dev/null
+++ b/target/linux/generic/patches-3.18/263-udp_tunnel_kconfig_hack.patch
@@ -0,0 +1,11 @@
+--- a/net/ipv4/Kconfig
++++ b/net/ipv4/Kconfig
+@@ -308,7 +308,7 @@ config NET_IPVTI
+ 	  on top.
+ 
+ config NET_UDP_TUNNEL
+-	tristate
++	tristate "IP: UDP tunnel"
+ 	select NET_IP_TUNNEL
+ 	default n
+ 
diff --git a/target/linux/generic/patches-4.1/263-udp_tunnel_kconfig_hack.patch b/target/linux/generic/patches-4.1/263-udp_tunnel_kconfig_hack.patch
new file mode 100644
index 0000000..e8fb296
--- /dev/null
+++ b/target/linux/generic/patches-4.1/263-udp_tunnel_kconfig_hack.patch
@@ -0,0 +1,11 @@
+--- a/net/ipv4/Kconfig
++++ b/net/ipv4/Kconfig
+@@ -308,7 +308,7 @@ config NET_IPVTI
+ 	  on top.
+ 
+ config NET_UDP_TUNNEL
+-	tristate
++	tristate "IP: UDP tunnel"
+ 	select NET_IP_TUNNEL
+ 	default n
+ 
diff --git a/target/linux/generic/patches-4.4/263-udp_tunnel_kconfig_hack.patch b/target/linux/generic/patches-4.4/263-udp_tunnel_kconfig_hack.patch
new file mode 100644
index 0000000..e8fb296
--- /dev/null
+++ b/target/linux/generic/patches-4.4/263-udp_tunnel_kconfig_hack.patch
@@ -0,0 +1,11 @@
+--- a/net/ipv4/Kconfig
++++ b/net/ipv4/Kconfig
+@@ -308,7 +308,7 @@ config NET_IPVTI
+ 	  on top.
+ 
+ config NET_UDP_TUNNEL
+-	tristate
++	tristate "IP: UDP tunnel"
+ 	select NET_IP_TUNNEL
+ 	default n
+