Add buildok testcase for rcu.stp.

diff --git a/testsuite/buildok/rcu.stp b/testsuite/buildok/rcu.stp
new file mode 100755 (executable)
index 0000000..22a246d
--- /dev/null
+++ b/testsuite/buildok/rcu.stp
@@ -0,0 +1,6 @@
+#! stap -p4
+
+probe begin {
+  printf("%d\n", rcu_dereference(0))
+  exit()
+}