bug#2403: And the guilty is: Garbage Collecting leak

[Ulrich Mueller]

> Other arches don't use GCPROs at all, instead they conservatively
> scan the whole stack.  They do that by setting

>    #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS

> in the corresponding emacs/src/s/*.h.  This is the preferred way to
> function, [...]

Since almost all other arches do it, I wonder if this shouldn't be
done for GNU/Linux on SuperH, too. That is, add "|| defined __sh__"
to the large #if statement in src/s/gnu-linux.h .

Ulrich