Add tests for cargo:rustc-check-cfg
Add tests for cargo:rustc-check-cfg

eminence/cargo,nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo,rust-lang/cargo,eminence/cargo,nipunn1313/cargo,nipunn1313/cargo,rust-lang/cargo,rust-lang/cargo,rustyhorde/cargo,eminence/cargo,rustyhorde/cargo