Update clippy for latest rustc changes

[Mark-Simulacrum]

Specifically, this revises the clippy integration to utilize a new
callback to register its lints, as the prior editing of lint store in
Session is no longer possible.

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changelog: none

[Mark-Simulacrum]

This is for rust-lang/rust#65193. cc @Manishearth

[Mark-Simulacrum]

This will need another pass since we need to register_lints as well for all the lints -- if you have thoughts on how to do that I'd be happy to do so. Previously this was implicit but that's no longer the case.

[Manishearth]

Got a try build we can rustup-toolchain-install-master to test with?

[Manishearth]

A lot of lib.rs is autogenerated with update-lints, so we can update that to do whatever registry you need

[Mark-Simulacrum]

Attempted to update update-lints to do the right thing and pushed relevant changes. Working on a try build in the rust PR.

[bors]

☔ The latest upstream changes (presumably #4560) made this pull request unmergeable. Please resolve the merge conflicts.

[matthiaskrgr]

rust-lang/rust#65193 was merged so we need this now

[flip1995]

Ready for final review

[tesuji]

You need to revert 974a05b to rustup rustc-dev component.

[flip1995]

Oh so bors decided to finally merge this PR 😄

On it 👍

[flip1995]

@bors treeclosed=10 p=10

[flip1995]

Now we should be good (at least cargo test passed locally)

[Mark-Simulacrum]

(Let me know if you need anything from me here)

[tesuji]

CI passed.

[phansch]

@bors r+

[bors]

📌 Commit b261664 has been approved by phansch

[bors]

⌛ Testing commit b261664 with merge 8ab24d7...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: phansch
Pushing 8ab24d7 to master...

[phansch]

@bors treeclose-