HcToEtacMuMu lines

Adding 4 lines, targetting micro dst. The rates/timing are:

StrippingReport INFO Event 100000, Good event 100000

• | Decision name|Rate,%|Accepted| Mult|ms/evt|
• |StrippingGlobal | 0.3200| 320| | 4.617|
• |StrippingSequenceStreamBhadron | 0.3200| 320| | 4.608|
• |!StrippingHc2EtacMuMu_PPbarLine | 0.0490| 49| 3.510| 3.061|
• |!StrippingHc2EtacMuMu_KsKpiLine | 0.0480| 48| 3.958| 0.506|
• |!StrippingHc2EtacMuMu_PhiPhiLine | 0.2430| 243| 10.914| 0.219|
• |!StrippingHc2EtacMuMu_4hLine | 0.0360| 36| 14.056| 0.138|
• |!StrippingHc2EtacMuMu_PPbarLine_TIMING | 0.0490| 49| 3.510| 0.019|
• |!StrippingHc2EtacMuMu_KsKpiLine_TIMING | 0.0480| 48| 3.958| 0.021|
• |!StrippingHc2EtacMuMu_PhiPhiLine_TIMING | 0.2430| 243| 10.914| 0.032|
• |!StrippingHc2EtacMuMu_4hLine_TIMING | 0.0360| 36| 14.056| 0.020|