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: Ia5fd5a3fa749ac6d0192f7d1fb77a5b6eedee124
Reviewed-on: https://git.eclipse.org/r/38641
Tested-by: Hudson CI
Reviewed-by: Judith Gull <jgu@bsiag.com>