While it is ok to build all libkiwix android builds in one step,
the "release system" upload only one archive per platform.
So we need 4 platforms to do 4 uploads.
As we don't build on "android" platform now, we can clean up our scripts.
SSH server which was used to receive file uploads (CI, nightly and release) has been
migrated to a new one on a different address.
Username, Key and paths are unchanged.
Most notable changes are the use of `master.download.kiwix.org` as the target in
replacement of `mirror.download.kiwix.org` (although it would still work) and the
Port to which SSH is listening on (30022 instead of 22)
Matthieu Gautier
renaud gaudin