Bug 576071 - Update developer documentation of e_book_query_{andv,orv}()

Closes https://bugzilla.gnome.org/show_bug.cgi?id=576071

src/addressbook/libebook-contacts/e-book-query.c

@@ -170,9 +170,10 @@ conjoinv (EBookQueryType type,
 /**
  * e_book_query_andv:
  * @q: first #EBookQuery
- * @...: %NULL terminated list of #EBookQuery pointers
+ * @...: (transfer full): %NULL terminated list of #EBookQuery pointers
  *
  * Creates a new #EBookQuery which is the logical AND of the queries specified.
+ * The new #EBookQuery takes ownership of the specified queries.
  *
  * Returns: A new #EBookQuery
  **/
@@ -192,9 +193,10 @@ e_book_query_andv (EBookQuery *q, ...)
 /**
  * e_book_query_orv:
  * @q: first #EBookQuery
- * @...: %NULL terminated list of #EBookQuery pointers
+ * @...: (transfer full): %NULL terminated list of #EBookQuery pointers
  *
  * Creates a new #EBookQuery which is the logical OR of the queries specified.
+ * The new #EBookQuery takes ownership of the specified queries.
  *
  * Returns: A new #EBookQuery
  **/