[glib] docs: Add index for 2.52 api

[Rico Tzschichholz <ricotz src gnome org>]

commit cb26c677e691c33af1da9789f55f7a32a56eaa8f
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Feb 5 12:55:25 2017 +0100

    docs: Add index for 2.52 api

 docs/reference/gio/gio-docs.xml   |    4 ++++
 docs/reference/glib/glib-docs.xml |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gio/gio-docs.xml b/docs/reference/gio/gio-docs.xml
index cd7c056..bc23bf9 100644
--- a/docs/reference/gio/gio-docs.xml
+++ b/docs/reference/gio/gio-docs.xml
@@ -353,6 +353,10 @@
     <title>Index of new symbols in 2.50</title>
     <xi:include href="xml/api-index-2.50.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-52" role="2.52">
+    <title>Index of new symbols in 2.52</title>
+    <xi:include href="xml/api-index-2.52.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>
 
diff --git a/docs/reference/glib/glib-docs.xml b/docs/reference/glib/glib-docs.xml
index 16cb08a..f30e44b 100644
--- a/docs/reference/glib/glib-docs.xml
+++ b/docs/reference/glib/glib-docs.xml
@@ -243,6 +243,10 @@
     <title>Index of new symbols in 2.50</title>
     <xi:include href="xml/api-index-2.50.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-52" role="2.52">
+    <title>Index of new symbols in 2.52</title>
+    <xi:include href="xml/api-index-2.52.xml"><xi:fallback /></xi:include>
+  </index>
 
   <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>