[Build error] Could not find auto-linked library 'snips_nlu_ffi'

[hffmnn]

Basically the same as #53, but when trying to build for macos it gives the following error: Could not find auto-linked library 'snips_nlu_ffi'. This is because the build script tries to copy libsnips_nlu_ffi.a in install_local_core:

cp: /Users/christian/workspace/soundreply/snips/snips-nlu-rs/snips-nlu-ffi/swift/SnipsNlu/../../..//target//debug/libsnips_nlu_ffi.a

which gives No such file or directory.

[klefevre]

@hffmnn This issue should have been fixed with this PR #96 and core binaries have been deployed on S3.