Update ctor eval debug output test expectation (#21729)

Update the expected output of `test_eval_ctors_debug_output` to account for
changed debug output due to WebAssembly/binaryen#6464.
The test will now succeed before and after that upstream Binaryen change.

Author: tlively

test/test_other.py

@@ -7926,7 +7926,7 @@ def test_eval_ctors_debug_output(self):
     err = self.run_process([EMXX, 'src.cpp', '--js-library', 'lib.js', '-O2', '-sEVAL_CTORS'], stderr=PIPE).stderr
     # logging should show we failed, and why
     self.assertNotContained('ctor_evaller: not successful', err)
-    self.assertContained('stopping since could not eval: call import: env.external_thing', err)
+    self.assertContained('could not eval: call import: env.external_thing', err)
 
   def test_override_js_execution_environment(self):
     create_file('main.c', r'''