Add FriBidi checks to build system
Add FriBidi checks to build system

libass/libass,Distrotech/libass,MrSmile/libass,ShiftMediaProject/libass,pigoz/libass-ct,Distrotech/libass,xbmc/libass,rhlee/libass,stps/libass,mwgoldsmith/libass,asimonov-im/libass,richardpl/libass,sanyaade-g2g-repos/libass,stps/libass,ShiftMediaProject/libass,torque/libass,torque/libass,richardpl/libass,pigoz/libass-ct,astiob/libass,tgoyne/libass,blinkseb/libass,grigorig/libass,mwgoldsmith/libass,Akemi/libass,Distrotech/libass,mwgoldsmith/libass,tgoyne/libass,grigorig/libass,pigoz/libass-ct,MrSmile/libass,tgoyne/libass,xbmc/libass,asimonov-im/libass,sanyaade-g2g-repos/libass,rhlee/libass,blinkseb/libass,Akemi/libass,blinkseb/libass,sanyaade-g2g-repos/libass,torque/libass,stps/libass,libass/libass,astiob/libass,rhlee/libass,Akemi/libass,richardpl/libass