Darwin/iOS prep script: try and compile for arm64
Darwin: Freshen prep scripts, remove old script
Darwin/iOS: Include x86_64+aarch64 pieces in library
Darwin: Properly export headers from Xcode project
Darwin/aarch64: Use CNAME refs
Darwin/aarch64: Potentially(?) fix compile error
Darwin/aarch64: Restrict .size to ELF like arm32.
Darwin/aarch64: double == long double
Darwin/aarch64: Inhibit Xcode warning
Darwin/aarch64: Use Clang cache invalidation builtin
Darwin/aarch64: Fix "shadows declaration" warnings
Darwin/aarch64: size_t assumptions