Add support for OSS (Open Sound System)

Packages describing “oss” as local USE flag

Package“oss” Flag Description
media-sound/pulseaudio-daemonEnable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all.
media-sound/xwaxAdds support for OSS (open sound system) audio input/output.

All packages providing a “oss” USE flag (74)