acrn-config: support '--out' option for board/scenario/launch config

Currently, config tool generate board files and scenario files in
acrn-hypervisor directory, the origin souce code would be corrupted by
the config tool. Config tool add '--out' option for user to give a path
to store the generated files, without this option, tool will generate
files in origin source code.

Tracked-On: #4517
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>

misc/acrn-config/library/scenario_cfg_lib.py

@@ -708,3 +708,8 @@ def get_first_post_vm():
             break
 
     return (err_dic, i)
+
+
+def mkdir(path):
+
+    common.mkdir(path)