cffi-openmcl: prepend _ to external names on #+darwin, not just #+darwinppc
cffi-openmcl: prepend _ to external names on #+darwin, not just #+darwinppc

mcna/cffi,wesen/cffi,dochang/cffi,akovalenko/cffi,kingcheez/cffi-cheez,cffi/cffi,wesen/cffi,3b/cffi,dkochmanski/cffi,3b/cffi,dochang/cffi,mcna/cffi,marsijanin/cffi,dochang/cffi,marsijanin/cffi,cffi/cffi,stassats/cffi,dkochmanski/cffi,marsijanin/cffi,dkochmanski/cffi,stassats/cffi,akovalenko/cffi,wesen/cffi,attila-lendvai/cffi,stassats/cffi,akovalenko/cffi,kingcheez/cffi-cheez,3b/cffi,attila-lendvai/cffi,kingcheez/cffi-cheez,cffi/cffi