libffi-3.0.10 and HEAD, 13 Unexpected fails on OSX Lion with Clang-3.1 (318)

[P. Martin]

I don't like llvm-gcc either, but I supplied those results because of all
the complaints I get about clang.  llvm-gcc is not being released anymore.
The only compiler they make now is clang, and clang is the default compiler
on OSX.

Results with clang-3.1 (318) on OSX Lion 10.7.3 + XCode-4.3.2

    https://github.com/2bits/ffitest

		=== libffi Summary ===
# of expected passes		1646
# of unexpected failures	13
# of unsupported tests		55


The same number of fails probably means it's my fault.
If you see something I'm doing wrong, please let me know.
I am trying to verify this for Homebrew.