Changes

Summary

gr-gsm-master: migrate from archlinux to debian-bullseye-build (details)

Commit 6ab6e522495ed21b0c2bbe980572220f2025593a by Vadim Yanitskiy

gr-gsm-master: migrate from archlinux to debian-bullseye-build

Arch Linux ships gnuradio-3.9.4.0, while gr-gsm has not been migrated
to 3.9 yet.  Let's use debian:bullseye, which ships gnuradio-3.8.2.0.

Change-Id: I9900addf152fd254283ef340cea16583ee5ac1c5

gr-gsm-master/Dockerfile