Change expectation for jsshell on lib/async/timer_isolate_test.
Change expectation for jsshell on lib/async/timer_isolate_test.

An uncaught error in an isolate does not cause the program to exit.

R=whesse@google.com

Review URL: https://codereview.chromium.org//296733002

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@36351 260f80e4-7a28-3924-810f-c04153c831b5

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