bug#38944: libtgvoip fails to build on i686-linux

[Diego Nicola Barbato]

Hi Guix,

The package libtgvoip (introduced with commit 494135d) fails to build on
i686-linux [0].  Since this appears to be related to SSE2 these two
Debian patches [1] [2], which disable SSE2 on i386 (the first patch does
something unrelated, but it's required for the second one to apply),
should fix it.

Regards,

Diego

[0]: 
https://ci.guix.gnu.org/log/drp47myv1fv6a3scd2rz177yp5b89dp0-libtgvoip-2.4.2
[1]: 
https://sources.debian.org/patches/libtgvoip/2.4.4-2/Fix-WebRTC-for-non-Linux.patch/
[2]: https://sources.debian.org/patches/libtgvoip/2.4.4-2/Disable-SSE2.patch/