Use 'config.link_deps()' to link dependencies in codegen tests.

codegen/tests/tests.rs

@@ -8,20 +8,8 @@ fn run_mode(mode: &'static str) {
 
     config.mode = cfg_mode;
     config.src_base = PathBuf::from(format!("tests/{}", mode));
+    config.link_deps();
 
-    #[cfg(debug_assertions)]
-    let flags = [
-        "-L crate=../target/debug/",
-        "-L dependency=../target/debug/deps/",
-    ].join(" ");
-
-    #[cfg(not(debug_assertions))]
-    let flags = [
-        "-L crate=../target/release/",
-        "-L dependency=../target/release/deps/",
-    ].join(" ");
-
-    config.target_rustcflags = Some(flags);
     compiletest::run_tests(&config);
 }