setup: add (nested) library pySim.transport

* setup.py did not install pySim.transport sub-library

Change-Id: Ice026a28c4843121591f3404225c7f6aec4df6c7

setup.py

@@ -3,7 +3,7 @@ from setuptools import setup
 setup(
     name='pySim',
     version='1.0',
-    packages=['pySim'],
+    packages=['pySim', 'pySim.transport'],
     url='https://osmocom.org/projects/pysim/wiki',
     license='GPLv2',
     author_email='simtrace@lists.osmocom.org',