Streamline build process of openvpn + tor
tor and openvpn partly depend on same libraries like openssl. Both, openvpn and tor are built independently from each other depending on 2 different openssl libs.
Maybe this is a good situation, to finally fix the openvpn build process, which has always been kind of hackish, by adding and adapting the Makefiles in our project instead of using ics-openvpn's gradle tasks to build it.
As a result, we would reduce the app size by some megabytes and have a easier to understand setup.