Add pyi_out option to protoc command in the setup.py

Signed-off-by: ClemensLinnhoff <clemens.linnhoff@partner.bmw.de>

setup.py

@@ -116,7 +116,7 @@ def generate(self):
         for source in self.osi_files:
             sys.stdout.write("Protobuf-compiling " + source + "\n")
             source_path = os.path.join(package_name, source)
-            subprocess.check_call([self.find_protoc(), "--python_out=.", source_path])
+            subprocess.check_call([self.find_protoc(), "--python_out=.", "--pyi_out=.", source_path])
 
     def maybe_generate(self):
         if os.path.exists("osi_version.proto.in"):