Auto merge of #16361 - KuoE0:bug-1354000, r=heycam

Make stylo recognize -moz-crisp-edges keyword.

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See [Bug 1354000](https://bugzilla.mozilla.org/show_bug.cgi?id=1354000).

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1354000](https://bugzilla.mozilla.org/show_bug.cgi?id=1354000)

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- [X] These changes do not require tests because the they're in gecko.

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