chromium: add bbappend
chromium: add bbappend

Set PREFFERED_VERSION for nss, as chromium v45 doesn't work properly
with the newer version present in krogoth: it fails to open some web
sites (e.g. youtube.com) with "SSL connection error".

Signed-off-by: Andrey Konovalov <6decb425dd3212bf9b96628630c2d12a43fdad79@linaro.org>

linaro-home/meta-lhg,linaro-home/meta-lhg