[PTR-PLUS] Fix sparc-elf for branch (std_expand_builtin_va_start)

[Andrew_Pinski at PlayStation dot Sony dot Com]

Hi,
  The problem here is that we call make_tree with a pointer type (which I 
am still deciding is ok to do or not) in std_expand_builtin_va_start. This 
patch changes it to be sizetype instead and then do a conversion to the 
pointer type.  Since we are expanding right away, not much is needed to be 
done for std_expand_builtin_va_start anyways.
This fixes some (if not all) of the testcases for sparc-elf, I cannot 
fully test the sparc-elf, I can only test the compile tests.

Committed to the branch after a build for sparc-elf.  I did not fully test 
the patch but it is obviously correct and did test it for 
powerpc64-linux-gnu to make sure I did not introduce any warnings.

Thanks,
Andrew Pinski

ChangeLog:

        * builtins.c (std_expand_builtin_va_start): Use
        sizetype for the call to make_tree and then convert
        to the pointer type.

Attachment: fixsparcelf.diff.txt
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