Fix appveyor failure, messages differ by platform.
Fix appveyor failure, messages differ by platform.

eminence/cargo,tsurai/cargo,tsurai/cargo,rustyhorde/cargo,vojtechkral/cargo,tshepang/cargo,nipunn1313/cargo,eminence/cargo,rustyhorde/cargo,eminence/cargo,tsurai/cargo,nipunn1313/cargo,nipunn1313/cargo,tshepang/cargo,vojtechkral/cargo,rust-lang/cargo,rust-lang/cargo,tsurai/cargo,rustyhorde/cargo,rust-lang/cargo,tshepang/cargo,tsurai/cargo,vojtechkral/cargo,rustyhorde/cargo,vojtechkral/cargo,rust-lang/cargo,nipunn1313/cargo,eminence/cargo,tshepang/cargo