[glib] docs: Add index for 2.54 api

[Krzesimir Nowak <krnowak src gnome org>]

commit ce7e02193b568d2006edbbeb09055f45557ac6e6
Author: Krzesimir Nowak <krzesimir kinvolk io>
Date:   Thu Apr 27 21:28:48 2017 +0200

    docs: Add index for 2.54 api

 docs/reference/glib/glib-docs.xml |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/glib/glib-docs.xml b/docs/reference/glib/glib-docs.xml
index 4f6795a..5033a60 100644
--- a/docs/reference/glib/glib-docs.xml
+++ b/docs/reference/glib/glib-docs.xml
@@ -248,6 +248,10 @@
     <title>Index of new symbols in 2.52</title>
     <xi:include href="xml/api-index-2.52.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-54" role="2.54">
+    <title>Index of new symbols in 2.54</title>
+    <xi:include href="xml/api-index-2.54.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>