Docker: make build_docker.sh work for aarch64

docker/build/base.aarch64.dockerfile

-FROM nvcr.io/nvidia/l4t-base:r32.4.3
+ARG BASE_IMAGE
+FROM ${BASE_IMAGE}
+
 LABEL version="1.2"
 
 ENV DEBIAN_FRONTEND=noninteractive

docker/build/build_docker.sh

@@ -155,7 +155,7 @@ function determine_images_for_aarch64() {
     local cudnn_ver=8
     local trt_ver=7
 
-    local BASE_FMT ="L4T-cuda${cuda_ver}-cudnn${cuda_ver}-trt${trt_ver}-devel-${UBUNTU_LTS}"
+    local BASE_FMT="L4T-cuda${cuda_ver}-cudnn${cudnn_ver}-trt${trt_ver}-devel-${UBUNTU_LTS}"
     local CYBER_FMT="cyber-aarch64-${UBUNTU_LTS}"
 
     if [[ "${stage}" == "base" ]]; then

docker/build/dev.aarch64.dockerfile

 ARG BASE_IMAGE
-#=apolloauto/apollo:cyber-aarch64-18.04-20200929_0922
 FROM ${BASE_IMAGE}
 
 ARG GEOLOC