[Grml] speakup.synth boot parameter and grml2hd

[Michael Whapples]

Hello,
I noticed that in grml2hd when it prompts you for which boot parameters 
should be used for the append line it gives the speakup one as 
speakup_synth although now grml uses speakup.synth, therefore users 
can't add speakup.synth to an installed system through the interface, 
they have to do it manually using the boot loader. I noticed this when 
using a grml 2009.05RC2 CD (I know that grml 2009.05 has been released 
but I had the rc2 CD to hand when I needed to perform the install and I 
have just updated grml2hd on my system and examined the source code and 
this bug seems to still be present).

Michael Whapples