LLVM: Update submodule to include patches for MSP430.

[pftbest]

Fixes #37829

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @nikomatsakis (or someone else) soon.

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[japaric]

Thanks, @pftbest!

@bors r+

[bors]

📌 Commit 59a5254 has been approved by japaric

[pftbest]

Why did it fail checks? Is there something wrong with PR?

[japaric]

Is there something wrong with PR?

No AFAICT

Why did it fail checks?

That particular Travis build job has been failing in several other PRs though I don't know why. It's a false alarm.

[pftbest]

@japaric
good to know, thanks!

[bors]

⌛ Testing commit 59a5254 with merge ea79852...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-cargotest, auto-linux-64-cross-freebsd, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, 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-opt, auto-mac-64-opt-rustbuild, auto-mac-cross-ios-opt, auto-win-gnu-32-opt, auto-win-gnu-32-opt-rustbuild, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-cargotest, auto-win-msvc-64-opt, auto-win-msvc-64-opt-rustbuild
Approved by: japaric
Pushing ea79852 to master...