update ccminer x21s
add support for

compute_60,sm_60;compute_61,sm_61;compute_52,sm_52;compute_50,sm_50;compute_35,sm_35;compute_30,sm_30;compute_37,sm_37;compute_70,sm_70;compute_75,sm_75

recompile with vs2017v141cuda10.0 

RTX 