[BRLTTY] Compiling brltty with IBM viavoice support

[Ben Humphreys]

Hi all,

Need some help figuring out how to integrate Via Voice / IBM TTS / 
voxin with brltty.

Specifically, here's the error I'm getting:
/usr/bin/ld: cannot find -libmeci50

Here is how I'm running configure:
./configure -q \
--prefix=/opt/brltty \
--with-viavoice=/opt/IBM \
--with-speech-driver=vv

I'm compiling on Ubuntu 18.04 and I believe my voxin / Via Voice 
installation is ok since it works mostly with emacspeak.

Thanks in advance for any and all tips,

Ben