ci: Move variables to common-variables

This makes it a bit more obvious where the vars are available.

Signed-off-by: Guido Günther <agx@sigxcpu.org>

.gitlab-ci.yml

@@ -24,6 +24,9 @@ stages:
     LIBQMI_BRANCH: 'main'
     LIBQRTR_BRANCH: 'main'
     LIBMBIM_BRANCH: 'main'
+    BUILD_MBIM: true
+    BUILD_QMI: true
+    BUILD_QRTR: true
 
 build container:
   extends:
@@ -36,11 +39,6 @@ build container:
     - tags
     - schedules
 
-before_script:
-    - export BUILD_MBIM=true
-    - export BUILD_QMI=true
-    - export BUILD_QRTR=true
-
 .prepare_deps: &prepare_deps
     - >
       if [ "$BUILD_MBIM" == "true" ]; then