Mechanical translation which results in GlobalCtxt being Sync

Author: Zoxc

src/Cargo.lock

@@ -11,3 +11,4 @@ crate-type = ["dylib"]
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
 rustc_errors = { path = "../librustc_errors" }
+rustc_data_structures = { path = "../librustc_data_structures" }