[gnome-build-meta/jjardon/336_vm] Revert ".gitlab-ci.yml: don't build the VM images"

[Javier Jardón Cabezas <jjardon src gnome org>]

commit 19db68d240c7d533d8d7b4051705eb82761ffc50
Author: Javier Jardón <jjardon gnome org>
Date:   Sun May 3 17:20:48 2020 +0100

    Revert ".gitlab-ci.yml: don't build the VM images"
    
    This reverts commit 3d2ff920c98dc8d504a443fb1e0491ecd20b42cc.

 .gitlab-ci.yml | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index babe7d59..9c395b95 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -83,6 +83,9 @@ default:
     # Only run this build for x86_64, instead of building it somewhere else
     if [ "${ARCH}" == "x86_64" ]; then
         ${BST} build openh264-extension.bst:flatpak-repo.bst
+
+        ${BST_NO_PUSH} --max-jobs $(( $(nproc) / 4 )) -o arch "${ARCH}" build vm/image.bst
+        ${BST_NO_PUSH} -o arch "${ARCH}" checkout --hardlinks vm/image.bst image
     fi
 
   # Store all the downloaded git repos and tarballs in the cache.
@@ -97,6 +100,7 @@ default:
     paths:
     - logs
     - project.refs
+    - image
     expire_in: 1 week
 
 .flatpak-template: