Ignore lttngpy (#222)

Author: pablogs9

libmicroros.mk

@@ -82,6 +82,7 @@ $(EXTENSIONS_DIR)/micro_ros_src/src:
     touch src/rclc/rclc_examples/COLCON_IGNORE; \
 	touch src/rcl/rcl_yaml_param_parser/COLCON_IGNORE; \
 	touch src/ros2_tracing/test_tracetools/COLCON_IGNORE; \
+	touch src/ros2_tracing/lttngpy/COLCON_IGNORE; \
 	cp -rf $(EXTRA_ROS_PACKAGES) src/extra_packages || :; \
 	test -f src/extra_packages/extra_packages.repos && cd src/extra_packages && vcs import --input extra_packages.repos || :;