submodules: update clippy from b1d03437 to 3971c424#55484

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matthiaskrgr wants to merge 1 commit intorust-lang:masterfrom matthiaskrgr:clippy

+6-5

Commits on Oct 29, 2018

submodules: update clippy from b1d0343 to 3971c42
matthiaskrgr
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