Log Message:
Add libnfc-1.7.1

libnfc is the first libre low level NFC SDK and Programmers API
released under the GNU Lesser General Public License. It provides
complete transparency and royalty-free use for everyone.

The library currently supports modulations for ISO/IEC 14443 A and
B, FeliCa, Jewel/Topaz tags and Data Exchange Protocol (P2P) as
target and as initiator.