[gdk-pixbuf] docs: Add missing symbols indexes

[Emmanuele Bassi <ebassi src gnome org>]

commit d3d7a1b45200a032167eb45a05f8bda035c00d87
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Apr 26 11:39:06 2018 +0100

    docs: Add missing symbols indexes

 docs/reference/gdk-pixbuf/gdk-pixbuf.xml |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gdk-pixbuf/gdk-pixbuf.xml b/docs/reference/gdk-pixbuf/gdk-pixbuf.xml
index ab13f88..f70b576 100644
--- a/docs/reference/gdk-pixbuf/gdk-pixbuf.xml
+++ b/docs/reference/gdk-pixbuf/gdk-pixbuf.xml
@@ -140,6 +140,18 @@
     <title>Index of new symbols in 2.14</title>
     <xi:include href="xml/api-index-2.14.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-18" role="2.18">
+    <title>Index of new symbols in 2.18</title>
+    <xi:include href="xml/api-index-2.18.xml"><xi:fallback /></xi:include>
+  </index>
+  <index id="api-index-2-22" role="2.22">
+    <title>Index of new symbols in 2.22</title>
+    <xi:include href="xml/api-index-2.22.xml"><xi:fallback /></xi:include>
+  </index>
+  <index id="api-index-2-24" role="2.24">
+    <title>Index of new symbols in 2.24</title>
+    <xi:include href="xml/api-index-2.24.xml"><xi:fallback /></xi:include>
+  </index>
   <index id="api-index-2-26" role="2.26">
     <title>Index of new symbols in 2.26</title>
     <xi:include href="xml/api-index-2.26.xml"><xi:fallback /></xi:include>
@@ -160,6 +172,10 @@
     <title>Index of new symbols in 2.36</title>
     <xi:include href="xml/api-index-2.36.xml"><xi:fallback /></xi:include>
   </index>
+  <index id="api-index-2-36-8" role="2.36.8">
+    <title>Index of new symbols in 2.36.8</title>
+    <xi:include href="xml/api-index-2.36.8.xml"><xi:fallback /></xi:include>
+  </index>
 
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