minirpcgen: Prepend ${base}_ to generated function/enum names
minirpcgen: Prepend ${base}_ to generated function/enum names

- Prepend package name to send and reply-async functions and sender callback
typedef names

- Add package name to procedure number enum values

- Fix bug causing emission of free_void() procedure

cmusatyalab/minirpc,cmusatyalab/minirpc