add lic6-compat to spark-base docker file

Author: echarles

resource-managers/kubernetes/docker-minimal-bundle/src/main/docker/spark-base/Dockerfile

@@ -21,7 +21,7 @@ FROM openjdk:8-alpine
 # docker build -t spark-base:latest -f dockerfiles/spark-base/Dockerfile .
 
 RUN apk upgrade --no-cache && \
-    apk add --no-cache bash tini && \
+    apk add --no-cache bash tini libc6-compat && \
     mkdir -p /opt/spark && \
     mkdir -p /opt/spark/work-dir \
     touch /opt/spark/RELEASE && \