Point to ffi 1.9.5. ffi 1.9.4 pulled due to https://github.com/ffi/ffi/issues/371.
Point to ffi 1.9.5.
ffi 1.9.4 pulled due to https://github.com/ffi/ffi/issues/371.

chef/omnibus-pushy,chef/omnibus-pushy,chef/omnibus-pushy