Add recent crash found by reliability bot to known_crashes.txt.  Bug for crash logged as 18700.
Add recent crash found by reliability bot to known_crashes.txt.  Bug for crash logged as 18700.

BUG=http://crbug.com/18700
TEST=less redness == more goodness

Review URL: http://codereview.chromium.org/165092

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@22678 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser