[gtk+] docs: add back id for section heading

[William Jon McCann <mccann src gnome org>]

commit fd7adf3b51e98a0e89c60dede4c5ecab436ef231
Author: William Jon McCann <william jon mccann gmail com>
Date:   Wed Feb 5 00:32:37 2014 -0500

    docs: add back id for section heading
    
    It was lost during the markdown conversion.

 gtk/deprecated/gtkuimanager.c |    2 +-
 gtk/gtkbuilder.c              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/deprecated/gtkuimanager.c b/gtk/deprecated/gtkuimanager.c
index 429ff35..7400213 100644
--- a/gtk/deprecated/gtkuimanager.c
+++ b/gtk/deprecated/gtkuimanager.c
@@ -121,7 +121,7 @@
  * enclosed in doublequotes, thus they must not '"' characters or references
  * to the &quot; entity.
  *
- * ## A UI definition ##
+ * # A UI definition #
  *
  * |[
  * <ui>
diff --git a/gtk/gtkbuilder.c b/gtk/gtkbuilder.c
index 4a85e9f..8d77ed9 100644
--- a/gtk/gtkbuilder.c
+++ b/gtk/gtkbuilder.c
@@ -56,7 +56,7 @@
  * The function gtk_builder_connect_signals() and variants thereof can be
  * used to connect handlers to the named signals in the description.
  *
- * # GtkBuilder UI Definitions
+ * # GtkBuilder UI Definitions # {#BUILDER-UI}
  *
  * GtkBuilder parses textual descriptions of user interfaces which are
  * specified in an XML format which can be roughly described by the