encoder_example: add --[no-]activity-masking
encoder_example: add --[no-]activity-masking

jmvalin/daala,HeadhunterXamd/daala,ycho/daala,tribouille/daala,xiph/daala,iankronquist/daala,kustom666/daala,kustom666/daala,kustom666/daala,mbebenita/daala,jmvalin/daala,ascent12/daala,kustom666/daala,luctrudeau/daala,KyleSiefring/daala,nvoron23/daala,felipebetancur/daala,luctrudeau/daala,xiphmont/daala,mbebenita/daala,ascent12/daala,HeadhunterXamd/daala,kodabb/daala,HeadhunterXamd/daala,luctrudeau/daala,ycho/daala,felipebetancur/daala,ycho/daala,xiph/daala,luctrudeau/daala,felipebetancur/daala,kodabb/daala,tribouille/daala,xiphmont/daala,nvoron23/daala,KyleSiefring/daala,jmvalin/daala,jmvalin/daala,tribouille/daala,ascent12/daala,mbebenita/daala,kodabb/daala,iankronquist/daala,xiph/daala,KyleSiefring/daala,tribouille/daala,nvoron23/daala,HeadhunterXamd/daala,jmvalin/daala,luctrudeau/daala,iankronquist/daala,kustom666/daala,ycho/daala,xiph/daala,xiph/daala,mbebenita/daala,tribouille/daala,KyleSiefring/daala,nvoron23/daala,ascent12/daala,ycho/daala,kodabb/daala,kodabb/daala,HeadhunterXamd/daala,felipebetancur/daala,KyleSiefring/daala,felipebetancur/daala,xiphmont/daala,iankronquist/daala,nvoron23/daala,xiphmont/daala,mbebenita/daala,xiphmont/daala,ascent12/daala,iankronquist/daala