gitlab: add build-loongarch to matrix

We have the compiler and with a few updates a container that can build
QEMU so we should at least run the check-tcg smoke tests.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231029145033.592566-6-alex.bennee@linaro.org>
diff --git a/.gitlab-ci.d/container-cross.yml b/.gitlab-ci.d/container-cross.yml
index 80c5402..d200f3e 100644
--- a/.gitlab-ci.d/container-cross.yml
+++ b/.gitlab-ci.d/container-cross.yml
@@ -52,6 +52,12 @@
   variables:
     NAME: debian-hppa-cross
 
+loongarch-debian-cross-container:
+  extends: .container_job_template
+  stage: containers
+  variables:
+    NAME: debian-loongarch-cross
+
 m68k-debian-cross-container:
   extends: .container_job_template
   stage: containers