487770: add org.eclipse.equinox.app to 4.5 target

when explicit-target is used, an old version of the Equinox launcher is
being used to run the tests and it doesn't understand a BREE of Java 8

Change-Id: Ibae1bf4de268185a38054842f0f018f59c80e071
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=487770
1 file changed