Add test for href of reexported enum variant

Author: GuillaumeGomez

tests/rustdoc/reexport/enum-variant.rs

@@ -0,0 +1,15 @@
+// This test ensures that the generated links are correctly generated to the associated
+// item.
+
+#![crate_name = "foo"]
+
+pub enum Foo {
+    S {
+        x: u32,
+    },
+}
+
+//@ has 'foo/index.html'
+
+//@ has - '//*[@class="item-table reexports"]/*[@id="reexport.S"]//a[@href="enum.Foo.html#variant.S"]' 'S'
+pub use self::Foo::S;