Changes

releng: Update target definition to build e4.24-based Trace Compass

This is to workaround Bug 580775 that prevents upgrading dependencies to
e4.25.

The target will use the latest source code in Trace Compass master
branch that is built with e4.24 dependencies.

Change-Id: I99214628c958afb0408dc8246f44c5eadf747253
Signed-off-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/195957
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>