Make "pub run foo" run "pub run foo:foo" rather than "pub run bin/foo"

sdk/lib/_internal/pub/test/run/mode_test.dart

Index: sdk/lib/_internal/pub/test/run/mode_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/mode_test.dart b/sdk/lib/_internal/pub/test/run/mode_test.dart
index f6c60ff84c9c518bc400f3d57b4a0c1a89e5afd5..ff8fd4bf8df932270a0debe1c17892f5395fa000 100644
--- a/sdk/lib/_internal/pub/test/run/mode_test.dart
+++ b/sdk/lib/_internal/pub/test/run/mode_test.dart
@@ -43,12 +43,12 @@ main() {
       createLockFile('myapp', pkg: ['barback']);
 
       // By default it should run in debug mode.
-      var pub = pubRun(args: ["script"]);
+      var pub = pubRun(args: ["bin/script"]);
       pub.stdout.expect("debug");
       pub.shouldExit();
 
       // A custom mode should be specifiable.
-      pub = pubRun(args: ["--mode", "custom-mode", "script"]);
+      pub = pubRun(args: ["--mode", "custom-mode", "bin/script"]);
       pub.stdout.expect("custom-mode");
       pub.shouldExit();
     });