fixed bug in lhvc split, base track now signaled as hvc1-hev1
fixed bug in lhvc split, base track now signaled as hvc1-hev1

RodolpheFouquet/gpac,gpac/gpac,rbouqueau/gpac,gpac/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,gpac/gpac,rbouqueau/gpac,gpac/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,gpac/gpac,gpac/gpac,rbouqueau/gpac,gpac/gpac,rbouqueau/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,gpac/gpac