LUCENE-5098: Broadword utility methods.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1502690 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5094: add ramBytesUsed to OrdinalMap

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1502697 13f79535-47bb-0310-9956-ffa450edef68