Uncatched NSExceptions should crash the web process
https://bugs.webkit.org/show_bug.cgi?id=130923
<rdar://problem/16463751>

Reviewed by Dan Bernstein.

* WebProcess/cocoa/WebProcessCocoa.mm:
(WebKit::WebProcess::platformInitializeWebProcess):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@166452 268f45cc-cd09-0410-ab3c-d52691b4dbfc