Add say support (using espeak) to linux platforms.
Add say support (using espeak) to linux platforms.

istr/busted,xyliuke/busted,DorianGray/busted,ryanplusplus/busted,Olivine-Labs/busted,nehz/busted,mpeterv/busted,o-lim/busted,sobrinho/busted,leafo/busted