Rust 1.17.0

[rillian]

Gecko bumped the minimum, so do the same here.

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This change is 

[kvark]

Travis fails to -lGL for some reason...
AppVeyor fails to compile src/perf.rs, the errors are related to 'static elision

[rillian]

Thanks, I'll look at the test failures tomorrow.

[rillian]

The 'static elision failure was just a typo: s/str/&str/. I've pushed a fix.

[rillian]

For the GL issue, I was able to fix it by installing libGL instead of libGLESv2, since that's what the build was expecting to link to. Maybe it's bitrot. It's also possible that we should be testing against libGLES and either the library name or sys crate's expectations changed under us, in which case this is the wrong fix, so please review carefully.

If anyone else wants to debug, I was able to reproduce on master in an ubuntu:trusty docker container:

apt-get update && apt-get -y upgrade
apt-get -y install git build-essential curl
apt-get -y install cmake pkg-config libfreetype6-dev libx11-dev libexpat1-dev
apt-get -y install libgles2-mesa-dev llvm-3.8-dev libedit-dev
adduser --disabled-password build
su - build
curl https://sh.rustup.rs -sSf | sh
source ~/.cargo/env
git clone https://github.com/servo/webrender
cd webrender/webrender && cargo test --all --verbose

[kvark]

Thanks for fixing the CI!
@bors-servo r+

[bors-servo]

📌 Commit 8e502c8 has been approved by kvark

[bors-servo]

⌛ Testing commit 8e502c8 with merge 951e3d0...

[bors-servo]

☀️ Test successful - status-travis
Approved by: kvark
Pushing 951e3d0 to master...