[BUILD] Changes core SDK to project SDK

For compatibility between different machines.

Change-Id: I1ad612d04710feeb0122bdc0d6607387fd3a2516
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/2022
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>