Build example/test FFI integration test via a Cargo integration test. #87
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It's easy to forget to
make -C examples check
when making changes that may affect FFI integration, and it's painful to only discover breakage after pushing to GitHub and getting a response from Travis.It'd be nicer if Cargo had a way to run external scripts so we could build and run these tests explicitly, but adding an integration test that does this is still an improvement over the current situation IMHO.
Longer term this may be addressed by rust-lang/cargo#545.