L2SDP-180, add mms_* bus and tb_mms_*

libraries/base/common/hdllib.cfg

libraries/base/common/src/vhdl/mms_common_variable_delay.vhd

libraries/base/common/tb/vhdl/tb_common_variable_delay.vhd

...ries/base/common/tb/vhdl/tb_mms_common_variable_delay.vhd