Initial version of BLE support for Bluedroid

Change-Id: I9825a5cef9be2559c34c2a529b211b7d471147cf
diff --git a/conf/bt_stack.conf b/conf/bt_stack.conf
index 2cd2f62..2ca20ea 100644
--- a/conf/bt_stack.conf
+++ b/conf/bt_stack.conf
@@ -16,6 +16,7 @@
 #   BT_TRACE_LEVEL_API     3    ( API traces )
 #   BT_TRACE_LEVEL_EVENT   4    ( Debug messages for events )
 #   BT_TRACE_LEVEL_DEBUG   5    ( Full debug messages )
+#   BT_TRACE_LEVEL_VERBOSE 6    ( Verbose messages ) - Currently supported for TRC_BTAPP only.
 TRC_BTM=2
 TRC_HCI=2
 TRC_L2CAP=2