sgsn: add statistics counter for LLC packets

new counters are:

llc.dl_bytes
llc.ul_bytes
llc.dl_packets
llc.ul_packets

The ip payload bytes are waiting for payload compression
because those data are known then.

Change-Id: I068376d35e84283cb98523cd3097a12c55cdb709
3 files changed
tree: ecf5b476bd6e91498b529c51213a9ed7ae6777dc
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap