Valgrind leak reported for BalloonHost::Init
Valgrind leak reported for BalloonHost::Init

Adds suppression for BalloonHost::Init.  The leak report started with
r115810 due to refactoring.  Appears to be a singleton report.

BUG=98716
TEST=Valgrind goes green on Chromium OS Bot
R=jam@chromium.org

Review URL: http://codereview.chromium.org/9046006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@115830 0039d316-1c4b-4281-b951-d872f2087c98

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