Support threaded binding opcodes

[PaulDance]

As one can see in loader.h, some additional binding opcodes are defined:

#define BIND_OPCODE_THREADED                                    0xD0
#define BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB 0x00
#define BIND_SUBOPCODE_THREADED_APPLY                            0x01

However, these are not found in this project's consts.rs:

rust-macho/src/consts.rs

Lines 844 to 855 in 4bf5fb1

	pub const BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: u8 = 0x20;
	pub const BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: u8 = 0x30;
	pub const BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: u8 = 0x40;
	pub const BIND_OPCODE_SET_TYPE_IMM: u8 = 0x50;
	pub const BIND_OPCODE_SET_ADDEND_SLEB: u8 = 0x60;
	pub const BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: u8 = 0x70;
	pub const BIND_OPCODE_ADD_ADDR_ULEB: u8 = 0x80;
	pub const BIND_OPCODE_DO_BIND: u8 = 0x90;
	pub const BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: u8 = 0xA0;
	pub const BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: u8 = 0xB0;
	pub const BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: u8 = 0xC0;

and are therefore not handled in opcode.rs, which means that if a file contains some opcode of 0xd0 or 0xf0, then the parsing will fail on:

rust-macho/src/opcode.rs

Lines 148 to 152 in 4bf5fb1

	(opcode, immediate) => {
	warn!("unknown bind opcode: {:x}, immediate = {}", opcode, immediate);
	None
	}

while it should not. There should instead be some support for these cases.