mk: Prepare for a new stage0 compiler

[alexcrichton]

This commit prepares the source for a new stage0 compiler, the 1.10.0 beta
compiler. These artifacts are hot off the bots and should be ready to go.

[rust-highfive]

r? @brson

(rust_highfive has picked a reviewer for you, use r? to override)

[alexcrichton]

r? @nikomatsakis

[nikomatsakis]

@bors r+

[bors]

📌 Commit 6631f9b has been approved by nikomatsakis

[Manishearth]

Travis fails

[bors]

⌛ Testing commit 6631f9b with merge 2ea4afe...

[bors]

💔 Test failed - auto-linux-64-debug-opt

[eddyb]

@alexcrichton This failure happened early enough to overlap with the clean step on other bots and this one left (at least) auto-linux-64-opt-rustbuild broken: http://buildbot.rust-lang.org/builders/auto-linux-64-opt-rustbuild/builds/1239/steps/clean/logs/stdio.
All of the clean steps on auto-linux-64-opt-rustbuild after that have been like this: http://buildbot.rust-lang.org/builders/auto-linux-64-opt-rustbuild/builds/1240/steps/clean/logs/stdio.

Looks like a very unlikely situation, but one we shouldn't miserably break on.

[eddyb]

@alexcrichton Looks like it fixed itself? Is it possible that bors went through the whole queue so fast that a single stale process was responsible for breaking clean on all of those attempts?

[alexcrichton]

@eddyb yeah I'm not really sure what happened, I'll try to investigate and see what went wrong.

[alexcrichton]

Ok, I fixed a bug where the snapshot download script didn't actually download the snapshot by accident. If this bounces we'll continue to see breakage, but hopefully we can smooth it out relatively quickly.

I think there are some more bugs, though, so I will keep combing logs.

@bors: r=nikomatsakis

[bors]

📌 Commit 0ccb285 has been approved by nikomatsakis

[alexcrichton]

@bors: p=1

Just wanna try to get this landed while I'm here to watch the queue

[bors]

⌛ Testing commit 0ccb285 with merge f9efbb2...

[bors]

💔 Test failed - auto-linux-64-x-android-t

[alexcrichton]

@bors: retry

• buildbot configuration bug

[bors]

⌛ Testing commit 0ccb285 with merge 505db05...

[bors]

💔 Test failed - auto-linux-64-nopt-t

[alexcrichton]

@bors: r=nikomatsakis fa45670

[bors]

⌛ Testing commit fa45670 with merge 601eb13...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-32cross-opt, auto-linux-64-cargotest, auto-linux-64-cross-armhf, auto-linux-64-cross-armsf, auto-linux-64-cross-freebsd, auto-linux-64-cross-netbsd, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-opt-mir, auto-linux-64-opt-rustbuild, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-mac-64-opt-rustbuild, auto-mac-cross-ios-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-32-opt-rustbuild, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-cross-opt, auto-win-msvc-32-opt, auto-win-msvc-64-cargotest, auto-win-msvc-64-opt, auto-win-msvc-64-opt-mir, auto-win-msvc-64-opt-rustbuild