Rollup merge of rust-lang#58288 - taiki-e:rustc-workspace-hack-2018, r=alexcrichton

Centril · web-flow · commit b8fe6f9d432c · 2019-02-12T04:42:20.000+01:00
rustc-workspace-hack => 2018 Transitions `rustc-workspace-hack` to Rust 2018; cc rust-lang#58099 r? @alexcrichton
diff --git a/src/tools/rustc-workspace-hack/Cargo.toml b/src/tools/rustc-workspace-hack/Cargo.toml
@@ -6,6 +6,7 @@ license = 'MIT/Apache-2.0'
 description = """
 Hack for the compiler's own build system
 """
+edition = "2018"
 
 [lib]
 path = "lib.rs"
