crypto/x509: this change modifies C.CopyPEMRoots to static function

[bxq2011hust]

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[bxq2011hust]

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This PR (HEAD: 6a07f25) has been imported to Gerrit for code review.

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Patch Set 1:

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Message from Ian Lance Taylor:

Patch Set 1: Run-TryBot+1

TRY=darwin-amd64,darwin-arm64

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Patch Set 1:

SlowBots beginning. Status page: https://farmer.golang.org/try?commit=f1ded899

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Patch Set 1: TryBot-Result+1

SlowBots are happy.
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Message from Ian Lance Taylor:

Patch Set 1: Code-Review+2

Thanks.

Committing to 1.14 because this will affect Darwin programs that use cgo. We should not intrude on the C namespace.

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This PR is being closed because golang.org/cl/214298 has been merged.