cffi-ecl: check for long-long support.
cffi-ecl: check for long-long support.

attila-lendvai/cffi,dkochmanski/cffi,3b/cffi,stassats/cffi,attila-lendvai/cffi,cffi/cffi,mcna/cffi,3b/cffi,3b/cffi,dkochmanski/cffi,stassats/cffi,cffi/cffi,mcna/cffi,cffi/cffi,stassats/cffi,dkochmanski/cffi