update deps to include erlang-asn1 and erlang-public-key
per Miguel Terron.

Enable build on ppc64le because simgear is now available.

Modernize abuild

community/dockerpy-creds: new aport. Its now a requirement for docker-py. Python3.6 not yet supported

Enable build on ppc64le as ocaml and lablgtk packages are now
enabled.

Enable build on ppc64le as ocaml is now available. Also use make -j1 for
now due to failure when using parallelism.

Enable build as openscenegraph now builds on ppc64le.

Enable build on ppc64le as ocaml and camlp4 are now available.

gst*1 was renamed