Add in a signal line with Topo in HLT2

Added in a small line for B2PPbarMuForTauMu

Thanks

From 300,000 events: |! Name | Rate%| Accept| Mult | ms/evt| |!StrippingB2PPbarMuForTauMuTopoLine_TIMING | 0.0064| 17| 1.059| 0.021|