Bug 1260872 - The docs are not being generated correctly on readthedocs - r=whimboo

MozReview-Commit-ID: Dazbq17WU9X

--HG--
extra : rebase_source : 8bfd81ccc8d8b7b4a08dc55242f4050e33c5064d

dom/media/test/external/requirements-docs.txt

@@ -0,0 +1,5 @@
+sphinx
+sphinx-rtd-theme
+
+-e dom/media/test/external
+