Microsoft.NET.Runtime.Emscripten.3.1.56.Sdk.linux-musl-x64 version 10.0.0 contains clang-19 linked against libc

[zotanmew]

Describe the bug

The package Microsoft.NET.Runtime.Emscripten.3.1.56.Sdk.linux-musl-x64 contains a clang-19 binary linked against glibc (instead of musl) in the version 10.0.0. Version 9.0.11 correctly contains a binary linked against musl-libc.

To Reproduce

1. Download the package from nuget.org and extract it
2. Run file tools/bin/clang-19
3. Observe that the output is ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[xxHash]=b5a2e404e8c8ecb5, stripped

[zotanmew]

(this breaks WASM AOT for some applications)

[zotanmew]

I had a look at all the intermediate versions, it looks like it broke between 10.0.0-preview.3.25168.2 and 10.0.0-preview.4.25258.110.

[zotanmew]

I tried to bisect dotnet/emsdk but couldn't work it out in a reasonable time, so I can't provide an exact regression commit, apologies.

[marcpopMSFT]

@lewing I couldn't move this to emsdk but seems like an issue with the workload packages.

[dotnet-policy-service]

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