add deploy.sh script

.gitlab-ci.yml

 stages:
     - build
     - commit
+    - deploy
 
 package:
   stage: build
@@ -28,3 +29,14 @@ commit:
 
   script:
     - pkg-commit.sh
+
+deploy:
+  stage: deploy
+  dependencies:
+    - package
+  script:
+    - pkg-deploy.sh
+
+  only:
+    changes:
+      - trunk/PKGBUILD