build: update waf to version 2.0.6

Cleanup in most build scripts

Change-Id: Ib024e95fb6f80e72b0c00e1dc8bb9300d6c5f191
diff --git a/docs/conf.py b/docs/conf.py
index 6c4682d..ae8f556 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -46,8 +46,9 @@
 
 addExtensionIfExists('sphinxcontrib.doxylink')
 
-if os.getenv('GOOGLE_ANALYTICS', None):
-    addExtensionIfExists('sphinxcontrib.googleanalytics')
+# sphinxcontrib.googleanalytics is currently not working with the latest version of Sphinx
+# if os.getenv('GOOGLE_ANALYTICS', None):
+#     addExtensionIfExists('sphinxcontrib.googleanalytics')
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']