Persistify the uncalibrated source links of Acts tracks.
The uncalibrated source links are bare pointers which are converted into element links during persistification, and are recreated from element links upon reading. The element links are stored in a dynamic aux variable uncalibratedMeasurementLinks, and the static aux variable holding the bare pointer is zero-ed in the persistent data.
Also extended the TrackAnalysisAlg to histogram the number of pixel and strip hits, which exercises the uncalibrated source links
Edited by Goetz Gaycken