drone: Move setup to a separate step

.drone.yml

@@ -4,7 +4,7 @@ type: kubernetes
 name: tests
 
 steps:
-  - name: test
+  - name: setup
     image: archlinux:latest
 
     settings:
@@ -22,6 +22,10 @@ steps:
     commands:
       - pacman -Sy --noconfirm
       - pacman -S --noconfirm base-devel python meson lsb-release git
+
+  - name: test
+    image: archlinux:latest
+    commands:
       - make test
 
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