added Makefile rule def-data: to install default data (demo.pcm)
added Makefile rule def-data: to install default data (demo.pcm)

unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1