rename Self_ -> SelfCls
Summary:
`Self` is a Rust keyword, so having an instruction called Self requires
annoying special case naming, like `Self_` in a few places. Let's rename the opcode.
While we're at it, a few related names are changed, for consistency. Here is the full list:
* Self -> SelfCls (opcode and SpecialClsRef)
* Parent -> ParentCls (opcode and SpecialClsRef)
* Static -> LateBoundCls (just the SpecialClsRef)
Reviewed By: mofarrell
Differential Revision:
D34536364
fbshipit-source-id:
0d9126fa3da38c632f233fed23a9a255ad733276