execute shell as bash for create_appspec.sh

Even though the create_appspec.sh is executed as bash at Makefile.unix.
It causes abnormal execution like below.
-e USER_ENTRY=xxx
'-e' is not needed at output file.

diff --git a/apps/tools/create_appspec.sh b/apps/tools/create_appspec.sh
index 40b4b25..b013905 100755 (executable)
--- a/apps/tools/create_appspec.sh
+++ b/apps/tools/create_appspec.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 ###########################################################################
 #
 # Copyright 2017 Samsung Electronics All Rights Reserved.