add back EnumValues in bootstrapped lib

Author: bishabosha

library/src-bootstrapped/scala/runtime/EnumValues.scala

@@ -0,0 +1,16 @@
+package scala.runtime
+
+class EnumValues[E <: Enum] {
+
+  def register(v: E) =
+    throw new UnsupportedOperationException("EnumValues should not be used")
+
+  def fromInt: Map[Int, E] =
+    throw new UnsupportedOperationException("EnumValues should not be used")
+
+  def fromName: Map[String, E] =
+    throw new UnsupportedOperationException("EnumValues should not be used")
+
+  def values: Iterable[E] =
+    throw new UnsupportedOperationException("EnumValues should not be used")
+}