Add support for 4 digits versions (1.2.3.4 -> v1r2p3t4)
This is needed to support native Geant4 versions (lhcb/Geant4#6 (closed)). See lhcb/Geant4#2 (comment 5724218)
This is needed to support native Geant4 versions (lhcb/Geant4#6 (closed)). See lhcb/Geant4#2 (comment 5724218)