Added flow for streamio

.gitmodules

flist/axi_stream_io_ip.flist

flist/f232h_ft1248_stream_ip.flist

fpga/makefile

socket/axi_stream_io/verilog/axi_stream_io.v

socket/uart_axi_master

socket/uart_axi_master/wrapper/verilog/uart_axi_master.v

...uart_axi_master/wrapper/verilog/uart_axi_master_M00_AXI.v

socket/verilog/axi_stream_io_v1_0.v