example: packet: add odp_term_global
example: packet: add odp_term_global

Add odp_term_global and comment that it will never
be called.
https://bugs.linaro.org/show_bug.cgi?id=1706

Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>
Reviewed-and-tested-by: Matias Elo <62402263e8617147f0e4dd5b7f6f8ec67f2b3d2c@nokia.com>

erachmi/odp,mike-holmes-linaro/odp,mike-holmes-linaro/odp,ravineet-singh/odp,ravineet-singh/odp,ravineet-singh/odp,nmorey/odp,erachmi/odp,dkrot/odp,nmorey/odp,mike-holmes-linaro/odp,dkrot/odp,nmorey/odp,ravineet-singh/odp,dkrot/odp,erachmi/odp,mike-holmes-linaro/odp,erachmi/odp,nmorey/odp,dkrot/odp