tests: adapt compile CB counting

I do not think that this test tests much, but hey, it's there, so let's
adapt to how the upstream libyang actually behaves and to what it calls
now.

Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>

Author: jktjkt

tests/test_extension.py

@@ -86,15 +86,15 @@ def tearDown(self):
     def test_extension_basic(self):
         self.ctx.load_module("yolo-system")
         self.assertEqual(5, self.plugin.parse_clb_called)
-        self.assertEqual(6, self.plugin.compile_clb_called)
+        self.assertEqual(10, self.plugin.compile_clb_called)
         self.assertEqual(0, self.plugin.parse_free_clb_called)
         self.assertEqual(0, self.plugin.compile_free_clb_called)
         self.assertEqual("type", self.plugin.parse_parent_stmt)
         self.ctx.destroy()
         self.assertEqual(5, self.plugin.parse_clb_called)
-        self.assertEqual(6, self.plugin.compile_clb_called)
+        self.assertEqual(10, self.plugin.compile_clb_called)
         self.assertEqual(5, self.plugin.parse_free_clb_called)
-        self.assertEqual(6, self.plugin.compile_free_clb_called)
+        self.assertEqual(10, self.plugin.compile_free_clb_called)
 
     def test_extension_invalid_parse(self):
         self.plugin.parse_clb_exception = LibyangExtensionError(