Do not try to use linuxmusl binaries on Chimera Linux

[valpackett]

Chimera Linux uses LLVM libc++ and does not package libstdc++. On *-chimera-linux-musl targets, currently trying to use modules that use prebuild-install without explicitly setting npm_config_build_from_source=true results in errors:

Error: Error loading shared library libstdc++.so.6: No such file or directory (needed by /home/val/.npm/_npx/61c85587157b818d/node_modules/sqlite3/build/Release/node_sqlite3.node)