Native plugins experience name conflicts when built for both x86 linux and arm64 linux

Steps to reproduce:

1. See thread here: https://discussions.unity.com/t/how-am-i-supposed-to-support-multiple-dedicated-server-archs-for-linux-with-native-plugins/1702862

Actual results: Name conflict prevents successful build with native plugins

Expected results: Native plugins do not experience a name conflict

Reproducible with versions: 6000.3 and newer

Not reproducible with versions: 6000.2 and prior

Can’t test with versions: 

Tested on (OS): Linux

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