added cffi package to be staged
added cffi package to be staged

VectorBlox/PYNQ,schelleg/PYNQ,JorisBolsens/PYNQ,cathalmccabe/PYNQ,VectorBlox/PYNQ,JorisBolsens/PYNQ,JorisBolsens/PYNQ,cathalmccabe/PYNQ,schelleg/PYNQ,VectorBlox/PYNQ,schelleg/PYNQ,Xilinx/PYNQ,schelleg/PYNQ,JorisBolsens/PYNQ,yunqu/PYNQ,Xilinx/PYNQ,cathalmccabe/PYNQ,Xilinx/PYNQ,schelleg/PYNQ,cathalmccabe/PYNQ,VectorBlox/PYNQ,yunqu/PYNQ,Xilinx/PYNQ,yunqu/PYNQ,yunqu/PYNQ,yunqu/PYNQ,VectorBlox/PYNQ,cathalmccabe/PYNQ,Xilinx/PYNQ,JorisBolsens/PYNQ,cathalmccabe/PYNQ