[rfc/rft] Fix incorrect static type in scm-lang.c

[Ulrich Weigand]

> scm-lang.c also contains a static type defined at startup depending on the
> initial current_gdbarch.  As with mdebugread.c, this is broken even with
> today's --enable-targets= support.
> 
> This patch removes the builtin_type_scm static type, and instead defines
> a per-gdbarch structure of builtin types, just like all other languages
> already do.

I've checked this in as well.

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com