crash-reporter: Avoid writing through symlinks.

BUG=7987
TEST=bvts

Change-Id: I875adeb5073936e790beb93f6a223a1642131cbd

Review URL: http://codereview.chromium.org/4603001
7 files changed
tree: d387f67c4dbfdca86473e30c18e44c6e34af914f
  1. crash_reporter/