gitlab: Add cross-riscv64-system, cross-riscv64-user

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210914185830.1378771-3-richard.henderson@linaro.org>
[AJB: add allow_failure]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Message-Id: <20210917162332.3511179-6-alex.bennee@linaro.org>

.gitlab-ci.d/crossbuilds.yml

@@ -124,6 +124,25 @@ cross-ppc64el-user:
   variables:
     IMAGE: debian-ppc64el-cross
 
+# The riscv64 cross-builds currently use a 'sid' container to get
+# compilers and libraries. Until something more stable is found we
+# allow_failure so as not to block CI.
+cross-riscv64-system:
+  extends: .cross_system_build_job
+  allow_failure: true
+  needs:
+    job: riscv64-debian-cross-container
+  variables:
+    IMAGE: debian-riscv64-cross
+
+cross-riscv64-user:
+  extends: .cross_user_build_job
+  allow_failure: true
+  needs:
+    job: riscv64-debian-cross-container
+  variables:
+    IMAGE: debian-riscv64-cross
+
 cross-s390x-system:
   extends: .cross_system_build_job
   needs: