Updating Dockerfile.rocm to use ROCm 4.2
diff --git a/tensorflow/tools/ci_build/Dockerfile.rocm b/tensorflow/tools/ci_build/Dockerfile.rocm
index bfcd797..723a478 100644
--- a/tensorflow/tools/ci_build/Dockerfile.rocm
+++ b/tensorflow/tools/ci_build/Dockerfile.rocm
@@ -3,10 +3,10 @@
FROM ubuntu:bionic
MAINTAINER Jeff Poznanovic <jeffrey.poznanovic@amd.com>
-ARG ROCM_DEB_REPO=http://repo.radeon.com/rocm/apt/4.1/
+ARG ROCM_DEB_REPO=http://repo.radeon.com/rocm/apt/4.2/
ARG ROCM_BUILD_NAME=xenial
ARG ROCM_BUILD_NUM=main
-ARG ROCM_PATH=/opt/rocm-4.1.0
+ARG ROCM_PATH=/opt/rocm-4.2.0
ENV DEBIAN_FRONTEND noninteractive
ENV TF_NEED_ROCM 1