Fix building for BOARD=watch (Fixes #8), enable in CI

.gitlab-ci.yml

@@ -1,8 +1,7 @@
 variables:
-  BOARD: "devboard"
   GIT_SUBMODULE_STRATEGY: "recursive"
 
-build:
+.build_template: &build_template
   image: registry.gitlab.maxregan.me/max/arm-build-image:latest
   stage: build
   script:
@@ -14,9 +13,20 @@ build:
       - "firmware/Application/*.elf"
       - "firmware/Application/*.bin"
 
-test:
+build-devboard:
+  <<: *build_template
+  variables:
+    BOARD: devboard
+
+build-watch:
+  <<: *build_template
+  variables:
+    BOARD: watch
+    
+test-devboard:
+  stage: test
   dependencies:
-    - build
+    - build-devboard
   tags:
     - tr-hw
     - privileged