VM: [Kernel] Add --embedder-entry-points-manifest to dartk/transform and pass it to the treeshaker

pkg/kernel/lib/target/targets.dart

Index: pkg/kernel/lib/target/targets.dart
diff --git a/pkg/kernel/lib/target/targets.dart b/pkg/kernel/lib/target/targets.dart
index 1c0627311f60c3836db170bf356d1d6c181cd927..5be34904980ead3832fe3807f5d6fa7dedeae517 100644
--- a/pkg/kernel/lib/target/targets.dart
+++ b/pkg/kernel/lib/target/targets.dart
@@ -8,12 +8,15 @@ import '../ast.dart';
 import 'vm.dart';
 import 'vmcc.dart';
 import 'flutter.dart';
+import '../transformations/treeshaker.dart' show ProgramRoot;
 
 final List<String> targetNames = targets.keys.toList();
 
 class TargetFlags {
   bool strongMode;
-  TargetFlags({this.strongMode: false});
+  List<ProgramRoot> programRoots;
+  TargetFlags(
+      {this.strongMode: false, this.programRoots: const <ProgramRoot>[]});
 }
 
 typedef Target _TargetBuilder(TargetFlags flags);