Created initial meta-xilinx layer.
Created initial meta-xilinx layer.

Signed-off-by: Nathan Rossi <e1e6d173c6873c0ae2b831215d22380d293bb314@petalogix.com>

nathanrossi/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,nathanrossi/meta-xilinx,Xilinx/meta-xilinx,nathanrossi/meta-xilinx,nathanrossi/meta-xilinx