Swap RA and RS when assembling "and", "or", and such instructions.

Swap RA and RS when assembling "and", "or", and such instructions.

They must use OP_RA_RS_RB_C instead of OP_RS_RA_RB_C.  The code
generator often sets RS and RA to the same register, so swapping them
causes no change in many programs.

I also rename OP_RS_RA_UI_CC to OP_RA_RS_UI_CC, and OP_RS_RA_C to
OP_RA_RS_C, because they already swap RA and RS.