Merge pull request scala#5545 from paplorinc/vectorCleanup

Minor Vector cleanup

Author: szeiger

bincompat-backward.whitelist.conf

@@ -5,6 +5,22 @@ filter {
     # "scala.reflect.runtime"
   ]
   problems=[
+    {
+      matchName="scala.collection.immutable.Vector.debug"
+      problemName=DirectMissingMethodProblem
+    },
+    {
+      matchName="scala.collection.immutable.VectorBuilder.debug"
+      problemName=DirectMissingMethodProblem
+    },
+    {
+      matchName="scala.collection.immutable.VectorPointer.debug"
+      problemName=DirectMissingMethodProblem
+    },
+    {
+      matchName="scala.collection.immutable.VectorIterator.debug"
+      problemName=DirectMissingMethodProblem
+    },
     {
       matchName="scala.reflect.runtime.JavaMirrors#JavaMirror.unpickleClass"
       problemName=IncompatibleMethTypeProblem