- Update to build on ubuntu 16.04.
- Docker: Set FORCE_UNSAFE_CONFIGURE=1. Fixes#275.
- Docker: Various fixes.
- Neovim: No longer require lua.
- Some minor package updates.
This fixes Android 6 problems (so closes#26).
It also rebuilds termux-elf-cleaner when needed
and bumps some build revisions for packages
needed updates to remove DT_VERDEF and DT_VERDEFNUM.