BLD: conda selectors for libgfortran when np==19
BLD: conda selectors for libgfortran when np==19

quantopian/zipline,wilsonkichoi/zipline,alphaBenj/zipline,alphaBenj/zipline,enigmampc/catalyst,florentchandelier/zipline,wilsonkichoi/zipline,humdings/zipline,magne-max/zipline-ja,bartosh/zipline,enigmampc/catalyst,Scapogo/zipline,humdings/zipline,florentchandelier/zipline,Scapogo/zipline,bartosh/zipline,quantopian/zipline,magne-max/zipline-ja