libnvidia-tls.so is not packaged

[dashesy]

I added this line to _export.sh

tar -C ${ARTIFACT_DIR}/tls -cvj $(basename -a ${ARTIFACT_DIR}/tls/*.so.*) > libraries-tls-${VERSION}.tar.bz2

It creates the right file, but also another empty file. Will work on a PR when I get time

There are 2 tls dlls and both should be packaged, but the one in tls directory has the newer ABI. The old ABI one is not passed to nvidia-docker. Some applications need the tls library to work.