[rfa] mips argument passing fixes for o32

[Elena Zannoni]

Andrew Cagney writes:
 > > 
 > > What should I do about the test in the meantime?  I don't have access
 > > to any other LE o32 compilers besides GCC, so I can't help you with
 > > that, and just leaving the FAIL seems inadequate.  I suppose I could
 > > XFAIL it.
 > 
 > 
 > Just leave it fail.  It is still a fixable bug.  Just need to figure out 
 > where it is.
 > 
 > 	Andrew
 > 
 > 

Please, stick a comment somewhere in the code/testfile. Or do you want
to go through this all over again next time? :-) (I can just see, with
my luck it'll be me having to refigure this out).

Elena