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

pkg/kernel/lib/target/vm.dart

Index: pkg/kernel/lib/target/vm.dart
diff --git a/pkg/kernel/lib/target/vm.dart b/pkg/kernel/lib/target/vm.dart
index d2643f5b5bdec5feaee1acb2cfc7e007806aa86b..bba31043a25c167e009c00d9f46ea7e39102a5f4 100644
--- a/pkg/kernel/lib/target/vm.dart
+++ b/pkg/kernel/lib/target/vm.dart
@@ -70,8 +70,10 @@ class VmTarget extends Target {
 
     if (program.mainMethod != null) {
       new TreeShaker(program,
-              hierarchy: hierarchy, coreTypes: coreTypes,
-              strongMode: strongMode)
+              hierarchy: hierarchy,
+              coreTypes: coreTypes,
+              strongMode: strongMode,
+              programRoots: flags.programRoots)
           .transform(program);
     }