Add gate-test- to some already existing tests

src/test/compile-fail/gated-attr-literals.rs

@@ -10,6 +10,8 @@
 
 // Check that literals in attributes don't parse without the feature gate.
 
+// gate-test-attr_literals
+
 #![feature(rustc_attrs)]
 #![allow(dead_code)]
 #![allow(unused_variables)]

src/test/compile-fail/gated-naked_functions.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// gate-test-naked_functions
+
 #[naked]
 //~^ the `#[naked]` attribute is an experimental feature
 fn naked() {}

src/test/compile-fail/never-disabled.rs

@@ -10,6 +10,8 @@
 
 // Test that ! errors when used in illegal positions with feature(never_type) disabled
 
+// gate-test-never_type
+
 trait Foo {
     type Wub;
 }

src/test/compile-fail/unadjusted-unstable.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// gate-test-abi_unadjusted
+
 extern "unadjusted" fn foo() {
 //~^ ERROR: unadjusted ABI is an implementation detail and perma-unstable
 }