sh: ensure release dir exists in static king build
sh: ensure release dir exists in static king build

Fixes a minor bug that can occur when copying the resulting binary.

(Also removes the use of ldd, which doesn't apply in the static binary
case.)

ngzax/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,jfranklin9000/urbit,ngzax/urbit,jfranklin9000/urbit,jfranklin9000/urbit,jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,jfranklin9000/urbit,jfranklin9000/urbit,urbit/urbit,urbit/urbit