Accuracy improvements to syscall wrappers for OSX 10.8 and 10.9.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14140 a5019735-40e9-0310-863c-91ae7b9d1cf9
Make sanity check errors before/after syscalls be fatal.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14141 a5019735-40e9-0310-863c-91ae7b9d1cf9
Add a 32-bit-process-only suppression.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14142 a5019735-40e9-0310-863c-91ae7b9d1cf9
OSX 10.8/10.9: remove warning message.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14143 a5019735-40e9-0310-863c-91ae7b9d1cf9