Temp fix: don't run cargo lint tests in rustc test suite

tests/compile-test.rs

@@ -153,6 +153,9 @@ fn run_ui_toml(config: &mut compiletest::Config) {
 }
 
 fn run_ui_cargo(config: &mut compiletest::Config) {
+    if cargo::is_rustc_test_suite() {
+        return;
+    }
     fn run_tests(
         config: &compiletest::Config,
         filter: &Option<String>,