Merge branch 'speechsynth' into 'master'

speech synth improvements

See merge request kalilinux/build-scripts/live-build-config!2

kali-config/common/bootloaders/grub-pc/grub.cfg

@@ -46,10 +46,12 @@ menuentry "Live system (encrypted persistence, check kali.org/prst)" {
 # Installer (if any)
 LINUX_INSTALL
 
+if [ ! -e /boot/grub/install.cfg ]; then
 menuentry "Start installer with speech synthesis" {
 	linux KERNEL_GI speakup.synth=soft APPEND_GI 
 	initrd INITRD_GI
 }
+fi
 
 submenu 'Advanced options...' {
 

kali-config/common/hooks/live/accessibility-menu.binary

@@ -4,12 +4,13 @@ if [ ! -d isolinux ]; then
     cd binary
 fi
 
+if ! grep "speakup.synth=soft" isolinux/install.cfg >/dev/null; then
 cat >>isolinux/install.cfg <<END
 
 label installspk
 	menu label Install with ^speech synthesis
 	linux /install/gtk/vmlinuz
 	initrd /install/gtk/initrd.gz
-	append video=vesa:ywrap,mtrr vga=788 speakup.synth=soft -- quiet
+	append video=vesa:ywrap,mtrr vga=788 speakup.synth=soft --- quiet
 END
-
+fi