Previous script (from kiwix repository) created a APK with all architecture embeded.
Now, we generated a APK per architecture. It simplify the build process and
generate smaller APKs.
We may end in a deadlock if we publish dependencies archives at the end
of the compilation and if all compilation succeed.
For example project B may depend on project A.
If we change the project A API and the project B code to reflect the API
change and merge A' API in master and create a PR for B, the PR for B
will need a new archive with new project A' API.
However, as B' master fails with new A, the whole compilation fails and
nothing is publish. So B'PR is never compiled successfully.
By publish the archives as soons as generated, the A' new API will be
published and B'PR will compile correctly, even if master fails.
Will be able to merge B'PR without bypassing travisCI.
If we want to build other projects (kiwix-lib, kiwix-tools) with travis,
it is better to have all dependencies already compiled.
kiwix-build project now compiles them and publishes the dependencies
archive at the right place where other projects can use them.
Make `kiwix-build.py` also fail if sub-command fail instead of just print
an error message and quit.
`kiwix-deploy.py` is far more simple and already fails miserably if a
sub-command fails.
Matthieu Gautier