Audio inference fails on some platforms

[whbruce]

Audio inference fails to start with the following error:

{"levelname": "INFO", "asctime": "2021-07-30 04:22:36,484", "message": "Creating Instance of Pipeline audio_detection/environment", "module": "pipeline_manager"}
{"levelname": "ERROR", "asctime": "2021-07-30 04:22:36,511", "message": "Error on Pipeline 1: gst-core-error-quark: Could not initialize (1): /root/gst-video-analytics/gst/audio_inference_elements/base/processor.cpp(167): create_handles (): /GstPipeline:pipeline11/GvaAudioDetect:detection:\nSupported primitive descriptors list is empty for node: 143", "module": "gstreamer_pipeline"}

This is only seen on some platforms including systems based on these processors

• Core i5-8259U
• Core i7-7567U

This is a regression, not seen in earlier releases.

[whbruce]

Fixed in v0.6.1.