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.
Previously aliases such as arm-linux-androideabi-gcc was removed
from the gcc package. This causes trouble and confusion for things
that pick up the C compiler they where compiled with (e.g. ruby, go).
