Log Message:
Update to 0.3.16:

Version bump
if's need else's. Fix previous commit
Wrap force_align_arg_pointer in HAVE_I386
Add AltiVec detection support for OpenBSD
Fix double free on failed arm_init
Add SSE detection support for OpenBSD
init: shortcut benchmarking, if there is only one runable implementation.
Add x86_64/amd64 to unaligned access whitelist
Add cris to unaligned access whitelist
remove ltdl.m4
Clean up function prototypes used for casting
bump version
Remove ' DATA' from symbol list
Add srcdir to includes for out-of-source builds
Fix cpu detection on OS/X
Add avg2_32xn_u8