LUCENE-3984: Add a target to recalculate SHA1 checksums for JAR (jar-checksums, top-level).
LUCENE-3984: Add a target to recalculate SHA1 checksums for JAR (jar-checksums, top-level).

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1326183 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr