Change target_address_at and deserialization_set_special_target_at
for ori instead of addic.
Assembler::IsOri(): new method.
Is32BitLoadIntoR12 changed for ori instead of addic.
Assembler::mov() use ori instead of addic.
Declare IsOri().
PatchStackCheckCodeAt and RevertStackCheckCodeAt updated to calculate
address based on ori instruction.
Merge branch 'movori' of https://github.com/andrewlow/v8ppc into movori