Without this, the test jobs may spuriously run if the arm/x86_build
jobs fail.
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5186>
     TAG: *arm_test
   image: "$CI_REGISTRY_IMAGE/debian/arm_test:$TAG"
   needs:
+    - arm_build
     - meson-arm64
     - arm_test
 
     TAG: *x86_test-gl
   image: "$CI_REGISTRY_IMAGE/debian/x86_test-gl:$TAG"
   needs:
+    - x86_build
     - meson-testing
     - x86_test-gl
 
     TAG: *x86_test-vk
   image: "$CI_REGISTRY_IMAGE/debian/x86_test-vk:$TAG"
   needs:
+    - x86_build
     - meson-testing
     - x86_test-vk