Adds support for flite speech engine

Packages describing “flite” as local USE flag

Package “flite” Flag Description
app-accessibility/speech-dispatcher Adds support for flite speech engine
media-video/ffmpeg Adds a text-to-speech filter based on app-accessibility/flite.
app-text/stardict Enable text to speech synthesizer plugin using app-accessibility/flite engine
dev-qt/qtspeech Enable text-to-speech synthesizer plugin using app-accessibility/flite engine

All packages providing a “flite” USE flag (3)