Add unb2c_board_qsfp_leds_v2.vhd with tb.

boards/uniboard2c/libraries/unb2c_board/hdllib.cfg

...braries/unb2c_board/src/vhdl/unb2c_board_qsfp_leds_v2.vhd

...aries/unb2c_board/tb/vhdl/tb_unb2c_board_qsfp_leds_v2.vhd