Update config.guess and config.sub
config.sub: Accept arm64 as an alias for aarch64
apple-forwarding-arm64.S: Align code to 4 bytes
tests/Makefile: Remove sign-for-ios

As this is only intended for jailbroken devices anyway, there's no need
to sign it anymore, as all recent jailbreaks dont't require any
signature at all, not even a fake signature.
tests/Makefile: Fix run-on-ios

* Upload the shared library with the correct name.
* Set DYLD_LIBRARY_PATH.