Add failing test case.

tests/plat/bugs/bug-164-faddrn_c.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include "test.h"
+
+int doit(void)
+{
+  char buf[128];
+  int i;
+  i++;
+}
+
+int main(int argc, char *argv[])
+{
+    doit();
+    finished();
+    return 0;
+}