[bug#40445] gnu: gsm: Update to 1.0.19.

[Raghav Gururajan]

Hi Mathieu!

>> + #:make-flags
>> + (list
>> + ;; Added -fPIC with other default options.
>> + "CCFLAGS=-fPIC -c -O2 -DNeedFunctionPrototypes=1 -Wall -Wno-comment")
> 
> I wonder if we need all those options, the package seems to build fine
> without them. Could you have a look?

Yes, Maxim and I, updated these options, to use libgsm in mediastreamer, as a 
part of linphone packaging. :-)

Btw, currently the gsm package is in unusable state, after the commit 
"74c7f367daa554cedeb5f02a00d1cd02acf1584b".

Regards,
RG.