Allow building PlatformSupport packages

[eschnett]

This PR enables building PlatformSupport packages. Without this change, BinaryBuilder aborts with the respective error.

[giordano]

Why you need a package with a name like that?

[eschnett]

That's not a package. I am following the instructions in 0_RootFS/PlatformSupport/build_tarballs.jl.

[giordano]

I'm moderately sure I never had such a problem. Can you please elaborate how you're getting this error? What's the command you're running? What's the stack trace?

[giordano]

I think you should pass validate_name=false on the call place, it was introduced precisely for this: #1282

[eschnett]

I am running

julia build_tarballs.jl --debug --verbose --deploy riscv64-linux-gnu

in 0_RootFS/PlatformSupport from the command line. That's according to the instructions in build_tarballs.jl in that directory.

[giordano]

What I'm saying is that you need to fix the call at https://github.com/JuliaPackaging/Yggdrasil/blob/c49b39b0acfb3814a9b60384f0b2b639dc268ab7/0_RootFS/PlatformSupport/build_tarballs.jl#L183