guile-vm is completely self-compiling now!

* module/language/scheme/translate.scm (*the-compile-toplevel-symbol*):
  Reset to compile-toplevel, which requires a patch to guile.

* module/system/base/compile.scm (compile-file): Some foo so that we load
  up the scheme language before call-with-output-file. Fixes compilation
  of (language scheme) modules.

* module/system/base/language.scm (define-language): Don't unquote in
  make-language; refer to it by name instead, and export it.

* module/system/repl/Makefile.am (vm_DATA): Don't compile describe.scm,
  because we really can't deal with goops yet.

* module/system/repl/repl.scm (compile-toplevel): If we're compiling, put
  in a stub definition of start-stack, which is closely tied to the
  interpreter.

* src/vm_loader.c (load-program): Fix a very tricky corruption bug!

module/language/scheme/translate.scm

@@ -127,7 +127,7 @@
                 (else (syntax-error ,loc (format #f "bad ~A" ',sym) ,exp)))))))
   `(list ,@(map make1 body)))
 
-(define *the-compile-toplevel-symbol* 'load-toplevel)
+(define *the-compile-toplevel-symbol* 'compile-toplevel)
 
 (define primitive-syntax-table
   (make-pmatch-transformers