setup: add (nested) library pySim.transport

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

Change-Id: Ice026a28c4843121591f3404225c7f6aec4df6c7
diff --git a/setup.py b/setup.py
index 0fa3f1a..6b4335a 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 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',