Set EXAMPLE_PROGRAMS in one line.

Signed-off-by: Zhiyi Sun <zhiyisun@gmail.com>
diff --git a/examples/networking/CMakeLists.txt b/examples/networking/CMakeLists.txt
index 405d651..790f033 100644
--- a/examples/networking/CMakeLists.txt
+++ b/examples/networking/CMakeLists.txt
@@ -1,6 +1,5 @@
 set(EXAMPLE_FILES simulation.py)
-set(EXAMPLE_PROGRAMS simple_tc.py)
-set(EXAMPLE_PROGRAMS ${EXAMPLE_PROGRAMS} tc_perf_event.py)
+set(EXAMPLE_PROGRAMS simple_tc.py tc_perf_event.py)
 install(FILES ${EXAMPLE_FILES} DESTINATION share/bcc/examples/networking)
 install(PROGRAMS ${EXAMPLE_PROGRAMS} DESTINATION share/bcc/examples/networking)