Darwin: Inhibit Clang previous prototype warnings
Darwin/iOS: Fix mis-typing of vfp_reg_free
Fix dlmalloc warnings due to sizeof(size_t)
Darwin/iOS: Fix LLVM 3.3 warning re: memcpy.
Darwin: Modernize build scripts, include arm64
Darwin: Rebuild Xcode project, include 64bit parts
Darwin/x86_64: Fix 64/32 size shortening warnings
Darwin/aarch64: Use CNAME refs like arm32.
Darwin/aarch64: Restrict .size to ELF like arm32.
Darwin/aarch64: Account for long double being equal to double
Darwin/aarch64: Fix "shadows declaration" warnings
Darwin/aarch64: Fix size_t assumptions
Darwin/aarch64: Respect iOS ABI re: stack argument alignment