ignore vmlinux and extend example

Author: varun-r-mallya

.gitignore

@@ -7,3 +7,4 @@ __pycache__/
 *.ll
 *.o
 .ipynb_checkpoints/
+vmlinux.py

tests/passing_tests/ringbuf.py

@@ -33,3 +33,5 @@ def LICENSE() -> str:
 compile()
 b = BPF()
 b.load_and_attach()
+while True:
+    print("running")