Fixing the comment for RIL_REQUEST_SIM_OPEN_CHANNEL.

The comment was not fixed when we extended the command to optionally include
the select response.

Bug: 17983857
Change-Id: I6245a7c8de1d35bb421ad06c5fefa9619aac1167
diff --git a/include/telephony/ril.h b/include/telephony/ril.h
index 312c4ae..6f3338b 100644
--- a/include/telephony/ril.h
+++ b/include/telephony/ril.h
@@ -3830,6 +3830,8 @@
  *
  * "response" is int *
  * ((int *)data)[0] contains the session id of the logical channel.
+ * ((int *)data)[1] onwards may optionally contain the select response for the
+ *     open channel command with one byte per integer.
  *
  * Valid errors:
  *  SUCCESS