Temporary fix so 'asdl/run.sh osh-demo' compiles again.

core/id_kind_gen.py

@@ -41,7 +41,11 @@ def GenCppCode(kind_names, id_names, f, id_labels=None, kind_labels=None):
    Emit(', '.join(kind_names), f, 1)
  Emit('};\n', f)

  Emit('enum class Id : uint8_t {', f)
  # TODO: Change this back to a uint8_t?  Right now we have a Glob_ Kind which
  # pushes it over 256, but we don't really need it in Id.  It could easily be
  # its own type GlobId.

  Emit('enum class Id : uint16_t {', f)
  for names_in_kind in id_names:
    if id_labels:
      s = ', '.join(['%s=%s' % (i, id_labels[i]) for i in names_in_kind]) + ','