update test/ui/static-lifetime.stderr with new error message

Author: mikeyhew

src/test/ui/static-lifetime.stderr

@@ -1,10 +1,15 @@
-error[E0477]: the type `std::borrow::Cow<'a, A>` does not fulfill the required lifetime
+error[E0478]: lifetime bound not satisfied
   --> $DIR/static-lifetime.rs:13:20
    |
 13 | impl<'a, A: Clone> Arbitrary for ::std::borrow::Cow<'a, A> {}
    |                    ^^^^^^^^^
    |
-   = note: type must satisfy the static lifetime
+note: lifetime parameter instantiated with the lifetime 'a as defined on the impl at 13:1
+  --> $DIR/static-lifetime.rs:13:1
+   |
+13 | impl<'a, A: Clone> Arbitrary for ::std::borrow::Cow<'a, A> {}
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: but lifetime parameter must outlive the static lifetime
 
 error: aborting due to previous error