f0332241b4
Moving llvm-native fully to dev-dependencies removed it from the cook set: the cookbook's cook-tree (src/cook/tree.rs) only follows `dependencies` when resolving --with-package-deps, so llvm-native was staged-but-never-built and libclc failed installing a nonexistent stage.pkgar. Cooking llvm-native (main) via `dependencies` produces all its subpackage pkgars; stage .dev + .runtime (host static libs/cmake + host clang) as dev-dependencies.