liborc: add OpenPOWER ppc64 support
Background: liborc: a JIT compiler that will at run-time take orc code (in some byte format) and generate machine code for the architecture in question on the fly and then execute that whenever there's a function call https://gstreamer.freedesktop.org/projects/orc.html
There is growing interest in the OpenPOWER architecture.
IBM is currently offering bounties to developers who will port free software projects to OpenPOWER
Extending liborc to support translation of orc code to OpenPOWER ISA appears to be a prime candidate for a bounty.
A bounty was offered for similar work in ffmpeg libswscale and a developer has provided a solution for that
https://www.bountysource.com/issues/34315232-power8-vsx-vectorization-libswscale-input-c