Move testing code into a script

.drone.yml

@@ -6,5 +6,5 @@ steps:
   - name: test-compiler
     image: gcc
     commands:
-    - cd code/compiler/09
+    - cd code/compiler
-    - mkdir build && cd build
+    - ./test.sh

code/compiler/test.sh

@@ -0,0 +1,4 @@
+cd 09
+mkdir -p build && cd build
+cmake ..
+make -j8