Auto merge of #8155 - alexcrichton:reenable-test, r=ehuss
Auto merge of #8155 - alexcrichton:reenable-test, r=ehuss

Re-enable rustc-info-cache test again

Support for `-Cbitcode-in-rlib` is now on nightly!

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