related to :
```
File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
"__main__", mod_spec)
File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/root/src/app.py", line 189, in <module>
run()
File "/root/src/app.py", line 178, in run
prepare_avd(device, avd_name)
File "/root/src/app.py", line 74, in prepare_avd
os.symlink(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
FileExistsError: [Errno 17] File exists: '/root/devices/skins/galaxy_nexus' -> '/root/platforms/android-25/skins/galaxy_nexus'
Traceback (most recent call last):
File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
"__main__", mod_spec)
File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/root/src/app.py", line 189, in <module>
run()
File "/root/src/app.py", line 178, in run
prepare_avd(device, avd_name)
File "/root/src/app.py", line 74, in prepare_avd
os.symlink(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
FileExistsError: [Errno 17] File exists: '/root/devices/skins/galaxy_nexus' -> '/root/platforms/android-25/skins/galaxy_nexus'
```