FreeDV 1.4
Prepare for FreeDV 1.4 release - Remove devel suffix - Use codec2 v0.9.2 for internal build. - Use LPCNet v0.1 for internal build.
Prepare for FreeDV 1.4 release - Remove devel suffix - Use codec2 v0.9.2 for internal build. - Use LPCNet v0.1 for internal build.