Add orps and orpd SSE2 instructions.

  ;; logical

  (define-regular-sse-inst andpd    #x66 #x54 t)

  (define-regular-sse-inst andps    nil  #x54)

  (define-regular-sse-inst orpd     #x66 #x56 t)

  (define-regular-sse-inst orps     nil  #x56)

  (define-regular-sse-inst xorpd    #x66 #x57 t)

  (define-regular-sse-inst xorps    nil  #x57)

  ;; comparison