[devhelp] docs: add index of new symbols in 3.30

[Sébastien Wilmet <swilmet src gnome org>]

commit faa1f64f461cf3db31182d656e6ab438300268f0
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Apr 2 08:41:57 2018 +0200

    docs: add index of new symbols in 3.30

 docs/reference/devhelp-docs.xml |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/devhelp-docs.xml b/docs/reference/devhelp-docs.xml
index f5b09f7..87b1cf9 100644
--- a/docs/reference/devhelp-docs.xml
+++ b/docs/reference/devhelp-docs.xml
@@ -76,5 +76,9 @@
       <title>Index of new symbols in 3.28</title>
       <xi:include href="xml/api-index-3.28.xml"><xi:fallback /></xi:include>
     </index>
+    <index id="api-index-3-30" role="3.30">
+      <title>Index of new symbols in 3.30</title>
+      <xi:include href="xml/api-index-3.30.xml"><xi:fallback /></xi:include>
+    </index>
   </part>
 </book>