Bug 1589661. Switch WebRender AppVeyor CI to rust 1.36. r=kvark
Bug 1589661. Switch WebRender AppVeyor CI to rust 1.36. r=kvark

This fixes a recent build error.

Differential Revision: https://phabricator.services.mozilla.com/D49730

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/7cf32690c0c04f3025ca2fc5cb3caecb5f061bf6

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender