Add Projects.rst to the toctree.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158753 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/development_process.rst b/docs/development_process.rst
index f73bbf4..9d0d2f9 100644
--- a/docs/development_process.rst
+++ b/docs/development_process.rst
@@ -3,7 +3,14 @@
 Development Process Documentation
 =================================
 
- * `LLVM Project Guide <Projects.html>`_
+.. toctree::
+   :hidden:
+
+   Projects
+
+\
+
+ * :ref:`projects`
 
    How-to guide and templates for new projects that *use* the LLVM
    infrastructure.  The templates (directory organization, Makefiles, and test