test: fix over-dependence on native promise impl

In later versions of V8, the stack trace will be different than our
current expectations for Promise methods.

PR-URL: #11437
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Evan Lucas <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>

Author: ofrobots

test/message/unhandled_promise_trace_warnings.out

@@ -13,8 +13,8 @@
     at getAsynchronousRejectionWarningObject (internal/process/promises.js:*)
     at rejectionHandled (internal/process/promises.js:*)
     at *
-    at Promise.then (native)
-    at Promise.catch (native)
+    at Promise.then *
+    at Promise.catch *
     at Immediate.setImmediate (*test*message*unhandled_promise_trace_warnings.js:*)
     at *
     at *