emulator: sync with upstream

emulator: sync with upstream

This patch comes from below commits of upstream
=====================================================================
commit 98a77944e6d3d5706647bfa7235c175b32173436
Author: ERAMOTO Masaya <eramoto.masaya@jp.fujitsu.com>
Date:   Mon Apr 23 18:00:37 2018 +0900

   emulator/b1ee: Enable to specify host and port

   Removes the DEFAULT_SERVER macro because the default host seems to be
   unofficial since 2017.

commit b54111d2a432cdbd4926cce8be5b119b298e8477
Author: Łukasz Rymanowski <lukasz.rymanowski@codecoup.pl>
Date:   Fri Feb 9 18:26:25 2018 +0100

    emulator: Add initial LE states to btdev and API to set new one
=====================================================================

Change-Id: I9f94927c0b6f6dcf712ca137548691dfda53783a
Signed-off-by: Anupam Roy <anupam.r@samsung.com>