DEV: coccinelle: Add bug_on.cocci

This replaces an if + ABORT_NOW() by BUG_ON(). It might change behavior,
because BUG_ON will result in a no-op if not enabled.
diff --git a/dev/coccinelle/bug_on.cocci b/dev/coccinelle/bug_on.cocci
new file mode 100644
index 0000000..3837879
--- /dev/null
+++ b/dev/coccinelle/bug_on.cocci
@@ -0,0 +1,7 @@
+@@
+expression E;
+@@
+
+- if (E)
+- ABORT_NOW();
++ BUG_ON(E);