[issue39575] `coverage` build target should use --coverage instead of -lgcov

[MaskRay]

Change by MaskRay <maskray at google.com>:


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keywords: +patch
pull_requests: +17768
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18382

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39575>
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