Related: rhbz#1125588 ppc64le has new struct passing rules

http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01145.html
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01147.html

now we just fail instead of crash

Change-Id: I329c676337885bcf4fdfdcdb5912d75424862126