Update docker (#744)

* update dockerfile to build rocm5.6 rc3

* fix couple of docker issues

Dockerfile

 FROM ubuntu:20.04
-
+ARG DEBIAN_FRONTEND=noninteractive
 ARG ROCMVERSION=5.6
 ARG compiler_version=""
 ARG compiler_commit=""
@@ -9,23 +9,30 @@ RUN set -xe
 ARG DEB_ROCM_REPO=http://repo.radeon.com/rocm/apt/.apt_$ROCMVERSION/
 RUN useradd -rm -d /home/jenkins -s /bin/bash -u 1004 jenkins
 # Add rocm repository
+RUN chmod 1777 /tmp
 RUN apt-get update
-RUN apt-get install -y wget gnupg curl
-RUN --mount=type=ssh if [ "$ROCMVERSION" != "5.6"]; then \
-	wget -qO - http://repo.radeon.com/rocm/rocm.gpg.key | apt-key add - && \
+RUN apt-get install -y --allow-unauthenticated apt-utils wget gnupg2 curl
+RUN --mount=type=ssh if [ "$ROCMVERSION" != "5.6" ]; then \
+        wget -qO - http://repo.radeon.com/rocm/rocm.gpg.key | apt-key add - && \
         sh -c "echo deb [arch=amd64] $DEB_ROCM_REPO ubuntu main > /etc/apt/sources.list.d/rocm.list"; \
-    else sh -c "wget http://artifactory-cdn.amd.com/artifactory/list/amdgpu-deb/amd-nonfree-radeon_20.04-1_all.deb" && \
+    elif [ "$ROCMVERSION" = "5.6" ] && [ "$compiler_version" = "" ]; then \
+         sh -c "wget http://artifactory-cdn.amd.com/artifactory/list/amdgpu-deb/amd-nonfree-radeon_20.04-1_all.deb" && \
          apt update && apt-get install -y ./amd-nonfree-radeon_20.04-1_all.deb && \
-         amdgpu-repo --amdgpu-build=1567752 --rocm-build=compute-rocm-dkms-no-npi-hipclang/11914 && \
-         DEBIAN_FRONTEND=noninteractive amdgpu-install -y --usecase=rocm ; \
+         amdgpu-repo --amdgpu-build=1567752 --rocm-build=compute-rocm-dkms-no-npi-hipclang/11914; \
+    elif [ "$ROCMVERSION" = "5.6" ] && [ "$compiler_version" = "rc3" ]; then \
+         sh -c "wget http://artifactory-cdn.amd.com/artifactory/list/amdgpu-deb/amdgpu-install-internal_5.6-20.04-1_all.deb" && \
+         apt update && apt-get install -y ./amdgpu-install-internal_5.6-20.04-1_all.deb && \
+         sh -c 'echo deb [arch=amd64 trusted=yes] http://compute-artifactory.amd.com/artifactory/list/rocm-release-archive-20.04-deb/ 5.6 rel-45  > /etc/apt/sources.list.d/rocm-build.list' && \
+         amdgpu-repo --amdgpu-build=1602498; \
     fi
+RUN amdgpu-install -y --usecase=rocm --no-dkms
+
 RUN wget --no-check-certificate -qO - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | apt-key add -
 RUN sh -c "echo deb http://mirrors.kernel.org/ubuntu focal main universe | tee -a /etc/apt/sources.list"
 RUN curl -fsSL https://repo.radeon.com/rocm/rocm.gpg.key | gpg --dearmor -o /etc/apt/trusted.gpg.d/rocm-keyring.gpg
 
 # Install dependencies
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --allow-unauthenticated \
-    apt-utils \
     build-essential \
     ccache \
     cmake \
@@ -38,16 +45,11 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --allow-
     libpthread-stubs0-dev \
     llvm-amdgpu \
     pkg-config \
-    python \
     python3 \
-    python-dev \
     python3-dev \
     python3-pip \
     sshpass \
     software-properties-common \
-    rocm-dev \
-    rocm-device-libs \
-    rocm-cmake \
     vim \
     nano \
     zlib1g-dev \