click: Fix detection of Waf configuration variable

src/click/test/examples-to-run.py

@@ -8,7 +8,7 @@
 #
 # See test.py for more information.
 cpp_examples = [
-    ("nsclick-simple-lan", "ENABLE_CLICK == True", "False"),
+    ("nsclick-simple-lan", "NSCLICK == True", "False"),
 ]
 
 # A list of Python examples to run in order to ensure that they remain

test.py

@@ -54,7 +54,7 @@ interesting_config_items = [
     "ENABLE_TESTS",
     "EXAMPLE_DIRECTORIES",
     "ENABLE_PYTHON_BINDINGS",
-    "ENABLE_CLICK",
+    "NSCLICK",
     "ENABLE_BRITE",
     "ENABLE_OPENFLOW",
     "APPNAME",
@@ -69,7 +69,7 @@ ENABLE_REAL_TIME = False
 ENABLE_THREADING = False
 ENABLE_EXAMPLES = True
 ENABLE_TESTS = True
-ENABLE_CLICK = False
+NSCLICK = False
 ENABLE_BRITE = False
 ENABLE_OPENFLOW = False
 EXAMPLE_DIRECTORIES = []