nftables: fix build with glibc before 2.19

nftables: fix build with glibc before 2.19

Add a patch that has a local definition of IPPROTO_MH. This fixes build
with glibc before 2.19 that missed IPPROTO_MH.

Fixes:
http://autobuild.buildroot.net/results/b0a/b0ab6c8c765977cfdc9791d768d3ec2cf129d25d/
http://autobuild.buildroot.net/results/3ef/3ef36d9d03497ee1d5d20bd44aee6ccf12868f7b/
http://autobuild.buildroot.net/results/445/445f2291ebba521f0faac961ca8868ae99b2d795/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>