multimedia/aom: force rebuild consumers after 6f68add3f9ab
$ ffmpeg ... -c:v libaom-av1 ...
[libaom-av1 @ 0x804a89900] 3.2.0
[libaom-av1 @ 0x804a89900] Failed to initialize encoder: ABI version mismatch
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!