Take build dependencies into account during license checks

The comment says that build dependencies shouldn't matter unless they do
some kind of codegen. It is safer to always check it though.

src/tools/tidy/src/deps.rs

@@ -460,16 +460,7 @@ fn normal_deps_of_r<'a>(
         .iter()
         .find(|n| &n.id == pkg_id)
         .unwrap_or_else(|| panic!("could not find `{}` in resolve", pkg_id));
-    // Don't care about dev-dependencies.
-    // Build dependencies *shouldn't* matter unless they do some kind of
-    // codegen. For now we'll assume they don't.
-    let deps = node.deps.iter().filter(|node_dep| {
-        node_dep
-            .dep_kinds
-            .iter()
-            .any(|kind_info| kind_info.kind == cargo_metadata::DependencyKind::Normal)
-    });
-    for dep in deps {
+    for dep in &node.deps {
         normal_deps_of_r(resolve, &dep.pkg, result);
     }
 }