gitlab: enable check-tcg for linux-user tests

Switch to building in the new debian-all-test-cross image which has
most of the cross compilers inline.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200701135652.1366-35-alex.bennee@linaro.org>
1 file changed