hg: jdk9/dev: 4 new changesets

[lana.steuck at oracle.com]

Changeset: 919f9854f31e
Author:    katleman
Date:      2015-04-08 13:12 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/919f9854f31e

Added tag jdk9-b58 for changeset 6e78dd9b1210

! .hgtags

Changeset: 39e8a131289e
Author:    lana
Date:      2015-04-08 14:31 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/39e8a131289e

Merge

- make/MakeHelpers.gmk

Changeset: 87a3e58bff23
Author:    katleman
Date:      2015-04-09 06:40 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/87a3e58bff23

Added tag jdk9-b59 for changeset 39e8a131289e

! .hgtags

Changeset: 1a2e8fca8bf1
Author:    lana
Date:      2015-04-09 17:35 -0700
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/1a2e8fca8bf1

Merge