[pygobject] Add section title links

[Christoph Reiter <creiter src gnome org>]

commit 043903f89ffa7289ec996e0abec2043c256577fc
Author: Dan Yeaw <dan yeaw me>
Date:   Thu Mar 8 06:24:08 2018 -0500

    Add section title links
    
    Signed-off-by: Dan Yeaw <dan yeaw me>

 docs/devguide/dev_environ.rst | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/docs/devguide/dev_environ.rst b/docs/devguide/dev_environ.rst
index ad83ed8e..dff229a1 100644
--- a/docs/devguide/dev_environ.rst
+++ b/docs/devguide/dev_environ.rst
@@ -16,6 +16,8 @@ instructions on ":ref:`gettingstarted`" first, as they are a pre-requirement.
 Pipenv Setup
 ************
 
+.. _install-dependencies:
+
 Install Dependencies
 ====================
 In order to compile Python and pip install pygobject, pygobjectendencies are need for
@@ -229,6 +231,7 @@ do the following additional steps:
 Work on PyGObject
 *****************
 
+.. _platform-ind-steps
 
 Platform Independent Steps
 ==========================
@@ -246,6 +249,7 @@ additional steps:
     pipenv install flake8
     pipenv shell
 
+.. _additional-platform-steps
 
 Additional Steps Per Platform
 =============================