Tweak naming scheme in platform build names

Author: breskeby

.buildkite/pipelines/periodic-java-ea.template.yml

@@ -30,7 +30,7 @@ steps:
       buildDirectory: /dev/shm/bk
   - group: java-matrix
     steps:
-      - label: "{{matrix.GRADLE_TASK}} / java-ea"
+      - label: "{{matrix.GRADLE_TASK}} / {{matrix.image}} "
         command: .ci/scripts/run-gradle.sh -Druntime.java=$$JAVA_EA_VERSION -Dbwc.checkout.align=true $$GRADLE_TASK
         timeout_in_minutes: 300
         matrix: