JBoss Tools 4.2.0.CR2 / JBDS 8.0.0.CR2 should use Eclipse Luna SR1 (4.4.1), but everywhere we look, we see this Eclipse Platform feature:
org.eclipse.platform_4.4.0.v20140911-0143.jar
In both JBT and JBDS target platforms:
http://download.jboss.org/jbosstools/targetplatforms/jbdevstudiotarget/4.41.0.CR2-SNAPSHOT/REPO/features/
http://download.jboss.org/jbosstools/targetplatforms/jbosstoolstarget/4.41.0.CR2-SNAPSHOT/REPO/features/
Also, I can see this version in my local installation of JBDS 8.0.0.CR1 B286.

I know about JBIDE-18539 - that Eclipse didn't upversion the platform, so it's still 4.4.0 for SR1, but at least the time stamp should be v20140925 as mentioned in that JIRA. This seems like we don't have SR1 at all.