mpv: add smb build option (off)
mpv: add smb build option (off)

Disabled by default since mpv with samba support makes it GPL-3.

Someone would like to build mpv with samba support by yourself, so
restore support for it via build option. Just in case.

opsaaspo/void-packages,NeoChontrix/void-packages,opsaaspo/void-packages,ayghor/void-packages,coredumb/void-packages,opsaaspo/void-packages,gangsterakato/void-packages,kulinacs/void-packages,juliendehos/void-packages,liwakura/void-packages,floGik/void-packages,Bubble-be/void-packages,juliendehos/void-packages,juliendehos/void-packages,EaterOfCode/void-packages,liwakura/void-packages,Bubble-be/void-packages,liwakura/void-packages,EaterOfCode/void-packages,EaterOfCode/void-packages,gangsterakato/void-packages,necrophcodr/void-packages,gangsterakato/void-packages,WKuipers/void-packages,NeoChontrix/void-packages,opsaaspo/void-packages,floGik/void-packages,coredumb/void-packages,WKuipers/void-packages,opsaaspo/void-packages,kulinacs/void-packages,coredumb/void-packages,gangsterakato/void-packages,WKuipers/void-packages,juliendehos/void-packages,kulinacs/void-packages,liwakura/void-packages,liwakura/void-packages,EaterOfCode/void-packages,necrophcodr/void-packages,Bubble-be/void-packages,ayghor/void-packages,opsaaspo/void-packages,floGik/void-packages,Bubble-be/void-packages,necrophcodr/void-packages,kulinacs/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,coredumb/void-packages,ayghor/void-packages,juliendehos/void-packages,WKuipers/void-packages,NeoChontrix/void-packages,coredumb/void-packages,gangsterakato/void-packages,floGik/void-packages,floGik/void-packages,ayghor/void-packages,Bubble-be/void-packages,liwakura/void-packages,WKuipers/void-packages,kulinacs/void-packages,NeoChontrix/void-packages,juliendehos/void-packages,WKuipers/void-packages,ayghor/void-packages,kulinacs/void-packages,NeoChontrix/void-packages,coredumb/void-packages,necrophcodr/void-packages,EaterOfCode/void-packages,ayghor/void-packages,gangsterakato/void-packages,Bubble-be/void-packages,floGik/void-packages