Rename internal -> rustc::internal

Author: flip1995

src/bootstrap/bin/rustc.rs

@@ -310,7 +310,9 @@ fn main() {
         let crate_name = crate_name[1].to_string_lossy();
         if crate_name.starts_with("rustc") || crate_name.starts_with("syntax") {
             cmd.arg("-Zunstable-options");
-            cmd.arg("-Winternal");
+            if stage != "0" {
+                cmd.arg("-Wrustc::internal");
+            }
         }
     }
 

src/librustc_lint/lib.rs

@@ -497,7 +497,7 @@ pub fn register_internals(store: &mut lint::LintStore, sess: Option<&Session>) {
     store.register_group(
         sess,
         false,
-        "internal",
+        "rustc::internal",
         None,
         vec![
             LintId::of(DEFAULT_HASH_TYPES),