build: add mbeddr artifact, do not test when packaging

It is now possible to use the standard `assemble` task to assemble the
artifacts without running tests. This follows Gradle conventions.

build/com.mbeddr/languages/build.gradle

@@ -171,20 +171,16 @@ tasks.named('check') {
     dependsOn 'test'
 }
 
-
-def pubDeb
-if (ciBuild) {
-    pubDeb = test_mbeddr
-} else {
-    pubDeb = build_mbeddr
-}
-
-task package_mbeddr(type: Zip, dependsOn: pubDeb) {
+task package_mbeddr(type: Zip, dependsOn: build_mbeddr) {
     archiveFileName = 'com.mbeddr.zip'
     from artifactsDir
     include "mbeddr/**"
 }
 
+artifacts {
+    'default'(package_mbeddr)
+}
+
 publishing {
     publications {
         mbeddr(MavenPublication) {