[libcxx-commits] [libcxx] [libcxx][clang-modules] Fix headers being marked as textual (PR #130723)

[Ian Anderson via libcxx-commits]

ian-twilightcoder wrote:

None of these should be `textual` because they have declarations, which becomes a problem because their declarations build into all of their (transitive) includers' modules. However, we shouldn't fuse them by putting them all in the same submodule, and this will cause problems with `__config_site` I think, which is its own difficulty.

https://github.com/llvm/llvm-project/pull/130723