Fix for bug 817497 (Generic extension icons do not display anymore in Add-ons Manager). r=dolske.

--HG--
extra : rebase_source : 3a05f0f88c72545cffd27487a2e62668d2c19550
Bug 826042 - upload a new talos.zip to capture fixes for android. r=armenzg
Bug 826164 - Enable FAIL_ON_WARNINGS on MSVC in view/. r=roc