Bug 1179713 - fix the manifest of bluetooth2 marionette test set. r=btian

dom/bluetooth/bluetooth2/tests/marionette/manifest.ini

@@ -3,7 +3,9 @@ b2g = true
 browser = false
 qemu = false
 
-disabled = Bug 1175389
+# Hint: "disabled = xxxxx" statement should be added *below* the test that
+# we want to disable.
+
 [test_dom_BluetoothManager_API2.js]
 disabled = Bug 1175389
 [test_dom_BluetoothAdapter_enable_API2.js]
@@ -15,3 +17,4 @@ disabled = Bug 1175389
 [test_dom_BluetoothDevice_API2.js]
 disabled = Bug 1175389
 [test_dom_BluetoothAdapter_pair_API2.js]
+disabled = Bug 1175389