sunrpc/rpc/types.h: fix OS X and FreeBSD build problems

sunrpc/rpc/types.h: fix OS X and FreeBSD build problems

When I build arm-linux-gcc on OS X, I find glibc will get a build error
in sunrpc/rpc/types.h, so I add __APPLE_CC__ to make OS X build OK.
For FreeBSD, Add __FreeBSD__ to make it build OK, too.

URL: http://sourceware.org/ml/libc-alpha/2013-09/msg00155.html
URL: http://sourceware.org/ml/libc-alpha/2013-09/msg00217.html
URL: http://sourceware.org/ml/libc-alpha/2013-09/msg00240.html
Signed-off-by: Jia Liu <proljc@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>