copyright: Change HP copyright on x86 code to be more friendly

Implement rip relative addressing and put in some missing loads and stores.

Implement a handful more instructions and differentiate macroops based on the operand types they expect.

Use objects to pass around output code, and fix/implement a few things.

src/arch/x86/isa/formats/multi.isa:
Make the formats use objects to pass around output code.

Fix up a potentially misleading comment.

Big changes to use the new microcode assembler.

Reworked x86 a bit

Reworking how x86's isa description works. I'm adopting the following definitions to make figuring out what's what a little easier:

MicroOp: A single operation actually implemented in hardware.
MacroOp: A collection of microops which are executed as a unit.
Instruction: An architected instruction which can be implemented with a macroop or a microop.

A batch of changes and fixes. Macroops are now generated automatically, multiops do alot more of what they're supposed to (excluding memory operands), and microops are slightly more implemented.

Made the MultiOp format do a little more. It now sets up single microop instructions to return an instance of the right class. The code to decode register numbers and generate loads and stores still needs to be added. Also, a syntax for specifying operands as sources, destinations, or both needs to be established. Multipl microop instructions are also not handled, pending real macroop generation support.

Start implementing groups of instructions which do the same thing on different sets of inputs.