taxonomy: export more information.

With the experience of a few months gathering signatures,
add more fields to the signature:
1. 802.11n A-MPDU information (can be distinguishing)
2. 802.11n MCS and spatial stream information
3. 802.11ac MCS and spatial stream information, TX and RX
4. Interworking (Hotspot 2.0)
5. Extended Capabilities

This version2 signature can be transformed into a v1 signature
by removing the new fields, so we don't immediately have to
discard all existing signatures.

Change-Id: I7c7403b51966a49042f124d7425d67848a0ddc76
2 files changed