xfrm: fix libnl-xfrm-3.sym linker versioning
xfrm: fix libnl-xfrm-3.sym linker versioning

Sections with already released API must not be modified or
extended. A new section must be added for each release.

thom311/libnl,greearb/libnl-ct,thom311/libnl,thom311/libnl,greearb/libnl-ct,greearb/libnl-ct