Add sparc64-*-rtems*

[Eric Botcazou]

> 2010-05-19  Joel Sherrill <joel.sherrill@oarcorp.com>
>
>      * config.gcc (sparc64-*-rtems*): New target.
>      * config/sparc/sp64-rtemself.h: New file.

I presume you cannot reuse sparc/rtemself.h because of

/* __svr4__ is used by the C library (FIXME) */
#undef CPP_SUBTARGET_SPEC
#define CPP_SUBTARGET_SPEC "-D__svr4__"

in sp64-elf.h?  If so, let's remove theses lines and not add sp64-rtemself.h.

OK with this change.

-- 
Eric Botcazou