I am using the 2016 Q1 SP3 release of the Kendo mobile controls with the Nova theme, and the drawer icon is not showing up. Here is a snippet of my markup:
This can be reproduced using the sample code from the Kendo Mobile drawer demo - http://dojo.telerik.com/onUDi
Interestingly, if I go back to the 2015 Q3 SP1 release of the Kendo controls, it works. So it appears that something was changed with the Q1 2016 release.
I found this in the Kendo css files - the icon is defined there but it doesn't render anything in the browser.