TauAnalysisTools: Fix cling warning in gcc10 build.
In the gcc10 build, cling gets confused about the type of CommonEfficiencyTool::m_mSF and emits an ugly warning. Hide this member from cling to avoid this.
In the gcc10 build, cling gets confused about the type of CommonEfficiencyTool::m_mSF and emits an ugly warning. Hide this member from cling to avoid this.