Merge pull request #4242 from dims/kube-cross-arm64-cross-compilers

Add ppc64le and s390x cross-compilers to arm64 kube-cross image

Author: k8s-ci-robot

images/build/cross/default/Dockerfile

@@ -78,7 +78,8 @@ fi
 RUN targetArch=$(echo $TARGETPLATFORM | cut -f2 -d '/') \
   && if [ ${targetArch} = "arm64" ]; then \
     apt-get update \
-    && apt-get install -y build-essential gcc-x86-64-linux-gnu; \
+    && apt-get install -y build-essential gcc-x86-64-linux-gnu \
+    && apt-get install -y crossbuild-essential-ppc64el crossbuild-essential-s390x; \
 fi
 
 RUN targetArch=$(echo $TARGETPLATFORM | cut -f2 -d '/') \