timing.core: make CallGraphAnalysis use LazyArrayListStore.

timing.core: make CallGraphAnalysis use LazyArrayListStore.

The callgraph analysis receive out of order segments when multi-threaded.
This accelerates the callgraph creation by an order of magnitude in that
case.

Bug 500591

Change-Id: Iba9436a7df9ccbc4d3cb3d6ec5ce7377e17f8d2c
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/79878
Reviewed-by: Hudson CI
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>