Add support for AVIRT

Leverage the new AVIRT driver for a more secure, more dynamically
configurable loopback sound driver.

To use, replace the file smixer-4a-default.json with
smixer-4a-avirt.json, at /usr/libexec/agl/smixer/etc

The existing snd-aloop configuration is not broken by this change.

The submodule libavirt is temporary, and will be transformed into a library.

Change-Id: I827636656c109a7393ad77997e05069a2462ea46
Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>

1 files changed, 0 insertions, 0 deletions

diff --git a/libavirt b/libavirt
new file mode 160000
+Subproject 53755ac91f5dc408c250f6313a924244fefe895