debian/changelog: bump version even more
requested to merge personal/peat-psuwit/xenial_-_android9_-_bump-version-even-more into ubports/xenial_-_android9
I just realized that 0.0.3+ubports1 becomes older than
0.0.3+ubports+0<...> that CI will generate. So, bump it further by
adding another + section.
I hope this fixes Android 9 rootfs generation this time.