DOCS: Moved multiarch and build system, Incorprated Scott's changes

Change-Id: I5a57846db2d4faac1aa24db4629b612657f59afb
Signed-off-by: John DeNisco <jdenisco@cisco.com>
diff --git a/docs/reference/index.rst b/docs/reference/index.rst
index 48b5170..23ddecd 100644
--- a/docs/reference/index.rst
+++ b/docs/reference/index.rst
@@ -7,9 +7,7 @@
 .. toctree::
    :maxdepth: 2
 
+   vppvagrant/index.rst
    readthedocs/index.rst
    github/index.rst
-   vppvagrant/index.rst
-   buildsystem/index.rst
-   multiarch/index.rst
    cmdreference/index.rst