test: Implement a test for the Drop trait on a generic struct. a=test-only

src/test/run-pass/drop-trait-generic.rs

@@ -0,0 +1,14 @@
+struct S<T> {
+    x: T
+}
+
+impl<T> S<T> : core::ops::Drop {
+    fn finalize() {
+        io::println("bye");
+    }
+}
+
+fn main() {
+    let x = S { x: 1 };
+}
+