headers: Add ARM64_32 constants
headers: Add ARM64_32 constants

Based on binary samples, it looks like CPU_TYPE_ARM64_32 is the same
constant as CPU_TYPE_ARM, ORed with a new ABI flag
(0x02000000, instead of 0x01000000 for CPU_ARCH_ABI64). Similarly,
the only CPU subtype seen so far appears to be a direct copy of
CPU_SUBTYPE_ARM64_V8 and CPU_SUBTYPE_ARM_V8.

Fixes #113.

woodruffw/ruby-macho,woodruffw/ruby-macho,woodruffw/ruby-macho,Homebrew/ruby-macho,Homebrew/ruby-macho,Homebrew/ruby-macho