libusb needs thread support, and so do other packages that depend on it. [thomas.petazzoni@free-electrons.com: adds threads dependency to libnfc-llp, which selects libnfc.] Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>