link: update copy of kernel header include/linux/if_link.h
link: update copy of kernel header include/linux/if_link.h

The next patch will use some of these defines, so update.

Taken from upstream kernel commit bc91b0f07ada5535427373a4e2050877bcc12218,
file 'include/uapi/linux/if_link.h'.

Signed-off-by: Dan Williams <aeade43d0f8ae14e7c44fa81fe17c1635ae376fe@redhat.com>
Signed-off-by: Thomas Haller <16e26612e4159990a6b3691e92592e691ff74132@redhat.com>

houstar/libnl,greearb/libnl-ct,mshirley/libnl,houstar/libnl,HolyShitMan/libnl-1,baloo/libnl,HolyShitMan/libnl-1,cfriedt/libnl,greearb/libnl-ct,HolyShitMan/libnl-1,tklauser/libnl,tklauser/libnl,tgraf/libnl,baloo/libnl,claudelee/libnl,honsys/libnl,mshirley/libnl,baloo/libnl,kolyshkin/libnl,thom311/libnl,dsahern/libnl,HolyShitMan/libnl-1,honsys/libnl,tklauser/libnl,kolyshkin/libnl,greearb/libnl-ct,congwang/libnl,tgraf/libnl,tgraf/libnl,houstar/libnl,claudelee/libnl,congwang/libnl,thom311/libnl,dsahern/libnl,baloo/libnl,thom311/libnl,congwang/libnl,kolyshkin/libnl,congwang/libnl,cfriedt/libnl,mshirley/libnl,cfriedt/libnl,cfriedt/libnl,dsahern/libnl,claudelee/libnl,claudelee/libnl,kolyshkin/libnl,tgraf/libnl,tklauser/libnl,dsahern/libnl,honsys/libnl,honsys/libnl,houstar/libnl,mshirley/libnl