Add webrender and webrender_traits to homu watchlist
Add webrender and webrender_traits to homu watchlist

ALikhachev/saltfs,rwaweber/saltfs,servo/saltfs,ALikhachev/saltfs,setupminimal/saltfs,UK992/saltfs,rwaweber/saltfs,rwaweber/saltfs,setupminimal/saltfs,ALikhachev/saltfs,UK992/saltfs,setupminimal/saltfs,UK992/saltfs,servo/saltfs