Dummy `build.rs` causes failure to build with specific lints.

[peterc-s]

naersk/lib.nix

Lines 197 to 203 in 8d97452

	# pretend there's a `build.rs`, otherwise cargo doesn't build
	# the `[build-dependencies]`. Custom locations of build scripts
	# aren't an issue because we strip the `build` field in
	# `fixupCargoToml`; so cargo always thinks there's a build
	# script which is `./build.rs`.
	echo 'fn main() {}' > build.rs
	popd > /dev/null

This causes builds to fail if, for example, missing-docs has been set to "deny".

Could be resolved by adding dummy documentation.

[nmattia]

Thanks for the report! Can you see if this fixes the issue for you? #378

[peterc-s]

Thanks for the report! Can you see if this fixes the issue for you? #378

Seems fixed, thank you!