hg: graal/graal-core: 2 new changesets

[doug.simon at oracle.com]

Changeset: 51e9f65cbde9
Author:    Roland Schatz <roland.schatz at oracle.com>
Date:      2016-02-15 19:08 +0100
URL:       http://hg.openjdk.java.net/graal/graal-core/rev/51e9f65cbde9

Add jdk9 to test matrix.

! .travis.yml

Changeset: 21b57edae278
Author:    Roland Schatz <roland.schatz at oracle.com>
Date:      2016-02-17 11:46 +0100
URL:       http://hg.openjdk.java.net/graal/graal-core/rev/21b57edae278

Merge pull request #31 from rschatz/travis-matrix

Add jdk9 to test matrix.