Adding libharfbuzz, without it there's no filter drawtext

Author: riskywoods

build-ffmpeg

@@ -949,6 +949,7 @@ if build "FreeType2" "2.13.3"; then
 fi
 
 CONFIGURE_OPTIONS+=("--enable-libfreetype")
+CONFIGURE_OPTIONS+=("--enable-libharfbuzz")
 
 if $NONFREE_AND_GPL; then
   if build "srt" "1.5.4"; then