Remove RTL_ infix from macros

Remove RTL_ infix from macros

* libguile/programs.h (SCM_PROGRAM_P):
  (SCM_PROGRAM_CODE):
  (SCM_PROGRAM_FREE_VARIABLES):
  (SCM_PROGRAM_FREE_VARIABLE_REF):
  (SCM_PROGRAM_FREE_VARIABLE_SET):
  (SCM_PROGRAM_NUM_FREE_VARIABLES):
  (SCM_VALIDATE_PROGRAM): Remove RTL_ infix.

* libguile/continuations.c:
* libguile/continuations.h:
* libguile/control.c:
* libguile/foreign.c:
* libguile/frames.c:
* libguile/gsubr.c:
* libguile/gsubr.h:
* libguile/procprop.c:
* libguile/procs.c:
* libguile/programs.c:
* libguile/stacks.c:
* libguile/vm-engine.c: Adapt.