Tgc / Mm Stripclusters - Add position in station

Add the position in station as data member to the prds as they're needed for segment making & hough seeding

Tagging @goblirsc, @syan

MuonSpectrometer/MuonPhaseII/Event/xAOD/xAODMuonPrepData/Root/MMClusterAuxContainer_v1.cxx

@@ -34,6 +34,7 @@ MMClusterAuxContainer_v1::MMClusterAuxContainer_v1()
    PRD_AUXVARIABLE(stripCharges);
    PRD_AUXVARIABLE(stripDriftDist);
    PRD_AUXVARIABLE(stripDriftErrors);
+   PRD_AUXVARIABLE(stripPosInStation);
 }
 }  // namespace xAOD
 #undef PRD_AUXVARIABLE
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