Auto merge of #19532 - mbrubeck:rustup, r=SimonSapin

Use Rust 1.22.1 for geckolib

This matches the version required for Firefox builds:
https://bugzilla.mozilla.org/show_bug.cgi?id=1421097

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This commit is contained in:
bors-servo 2017-12-09 01:14:02 -06:00 committed by GitHub
commit 051a715721

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@ -1 +1 @@
1.21.0
1.22.1