- also merge https://github.com/kivy/buildozer/pull/957 as prereq for
building multiple apks (one per arch)
- and custom buildozer commit to put target arch into apk name
old p4a did not work with new buildozer. kivy master crashes.
kivy latest release has runtime issues (orientation was landscape).
these versions seem to work.
also updated dockerfile to more closely match p4a master.