RFR(S): 8055910: closed/java/util/Collections/CheckedCollections.java failed with ClassCastException not thrown

[Roland Westrelin]

When I fixed JDK-8055153, I forgot to add the new arguments to the arraycopy macro node for Arrays.copyOf. As a consequence, there’s a missing subtype check in this intrinsic.

http://cr.openjdk.java.net/~roland/8055910/webrev.00/

Roland.