Valgrind: Supress a small net unittest leak.
Valgrind: Supress a small net unittest leak.

BUG=57456
TEST=valgrind net_unittests goes green.
TBR=agl
Review URL: http://codereview.chromium.org/3585005

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@61105 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