libv4l: restore LFS mismatch fix patch

Restore the patch that commit 9345b85b (libv4l: bump to version
1.12.6) has wrongly removed. This is needed for LFS builds for 32bit
targets.

Fixes:
http://autobuild.buildroot.net/results/461/46100c008c894e3f998227b2a9c9a79bfcbbda7c/
http://autobuild.buildroot.net/results/63b/63babd09b8a64fd4da80d99c4c2aed25e5532aec/
http://autobuild.buildroot.net/results/92b/92bd49d881ed11b2540e434af57ae7347ac186d2/



Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>