libnfc-llcp: new package

This patch adds the libnfc-llcp package.

This package requires a minium libnfc version of 1.6. A separate patch has
been submitted to bump the libnfc version; that patch should be regarded as
a prerequisite for the present patch.

Signed-off-by: Simon Dawson <spdawson@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>