Prevent crash dialog on Windows
Prevent crash dialog on Windows

The dialog causes build steps to time out, rather than catching a crash right
away.
Review URL: https://codereview.appspot.com/6515044

git-svn-id: 32fc27f4dcfb6c0385cd9719852b95fe6680452d@5558 2bbb7eff-a529-9590-31e7-b0007b416f81

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot