[libc-commits] [libc] [llvm] [build] Check RUNTIMES_${target}_LLVM_ENABLE_RUNTIMES for libc also (PR #82561)

[Petr Hosek via libc-commits]

petrhosek wrote:

> I did this in #82513 as well, but it adds the extra runtimes things. Don't know if that's the best way to express it, but I'd really prefer to not need to force people to change the rest of their build to enable the cross compiling targets.

I have more changes in the pipeline that redo the handling of the `default` target, this is just a preparatory change that addresses an existing limitation.

https://github.com/llvm/llvm-project/pull/82561