[project @ 2000-02-03 18:01:03 by sewardj]

Fix x86 NCG so the compiler can compile itself `-O':

-- Implement fake x86 insn GITOD/GITOF.
-- Implement primops ReadMutVarOp and WriteMutVarOp.
-- Pro tem, disable use of %eax as a spill temp.
-- Clarify wording of Rules of the Game comment in MachCode.