Merge pull request #93 from markslater/#92_jre_task_depedency

issue #92: jre task should declare a dependency on the jar task.

Author: siordache

src/main/groovy/org/beryx/runtime/JreTask.groovy

@@ -62,6 +62,7 @@ class JreTask extends BaseTask {
     }
 
     JreTask() {
+        dependsOn('jar')
         description = 'Creates a custom java runtime image with jlink'
     }