Alternative format for LCLx statements

The assembler permits an alternative statement format for LCLx instructions:
                                                               Cont.

         LCLA            &LOCAL_SYMBOL_FOR_DC_GEN,               X
                         &COUNTER_FOR_INNER_LOOP,                X
                         &COUNTER_FOR_OUTER_LOOP,                X
                         &COUNTER_FOR_TRAILING_LOOP