Update Eclipse project configurations

[Doug Simon @ Oracle]

After you have pulled http://hg.openjdk.java.net/graal/graal/rev/8d10fc6b4f6c, it is important to run 'mx eclipseinit' (or 'mx ideinit'). This is required so that changes made in Eclipse are deployed properly as the VM now only looks in <jdk>/jre/lib/graal.jar for the Graal classes. This change was made to reduce the overhead caused by having numerous directories on the bootclasspath.

-Doug