bug 441610: Release- and Build-Management for Mars

https://bugs.eclipse.org/bugs/show_bug.cgi?id=441610
set includeAllPlatforms="false" for mars target, because ppcle64 is
incomplete
Change-Id: Ic39959e82e2272c9d0c575f990d352cb70703bd3
Reviewed-on: https://git.eclipse.org/r/38639
Tested-by: Hudson CI
Reviewed-by: Judith Gull <jgu@bsiag.com>