rpm changelog: update from 1.5 to 1.6
rpm changelog: update from 1.5 to 1.6

Signed-off-by: Maxim Uvarov <db4d16e02ae2d7493db430203537da8b2e34f290@linaro.org>

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