libgcc sparc-rtems config on gcc head

[Eric Botcazou]

> The same solution seems to apply here: just rename the files to
> crt[in].S and use the generic rules.  They don't seem Solaris-specific
> either.

The renaming for SPARC is OK if it is done for i386 as well, but this doesn't 
really seem to be necessary, see below.

> The rules are generic and have been integrated into libgcc/Makefile.in,
> but only used unless CUSTOM_CRTIN is set in a target fragment.

s/unless/if/ I presume?  config/t-sol2 has the rules though so config/t-rtems 
could just copy them, at least for now.

-- 
Eric Botcazou