PATCH: Fix Solaris/SPARC bootstrap without gas

[Eric Botcazou]

> Is this closer to what you had in mind?  I called the new file elf-gas.h
> since there might be non-ELF systems using gas (not that I know of any).

Yes, thanks.  sparc/gas.h is sufficient I think, it should have a proper 
header, see for example sparc/sol2-gas.h.

SPARC_DONT_OVERRIDE_ASM_NAMED_SECTION is ugly, instead include the file after 
sparc/sysv4.h and restore the setting coming from elfos.h.

Do not change the Solaris targets for now.

-- 
Eric Botcazou