Use our own toolchain instead of the one in the image

Now that we are adding our own target we can compile our own toolchain
instead of using the stock one. This does mean that there isn't really a
purpose to using the alpine cc65 image though

.gitlab-ci.yml

@@ -3,20 +3,32 @@ default:
     - docker
 
 stages:
+  - build_toolchain
   - build_sw
   - build_hw
   - test
 
+build-cc65:
+  stage: build_toolchain
+  image: gcc
+  script:
+   - cd sw
+   - make toolchain
+
 build-kernel:
   stage: build_sw
-  image: a2geek/cc65-pipeline
+  image: gcc
   script:
     - cd sw/kernel
     - make
+  artifacts:
+    paths:
+      - sw/cc65/bin
+      - sw/cc65/lib
 
 build-bootloader:
   stage: build_sw
-  image: a2geek/cc65-pipeline
+  image: gcc
   script:
     - cd sw/bootloader
     - make
@@ -53,7 +65,7 @@ test_bb_spi:
 
 test-sw:
   stage: test
-  image: a2geek/cc65-pipeline
+  image: gcc
   script:
     - cd sw/kernel
     - make test