Add support aarch64 architecture

Support to run scripts in aarch64 Host Linux.

Tested: execute the scripts changed in this commit in Aarch64 Host
Ubuntu OS and check they can execute successfully

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: Idde23fbd09c5000c710f4f6d88793fefbb0cb04c
diff --git a/build-rootfs-size-docker.sh b/build-rootfs-size-docker.sh
index 4243ab9..cde66e6 100755
--- a/build-rootfs-size-docker.sh
+++ b/build-rootfs-size-docker.sh
@@ -21,6 +21,9 @@
     "x86_64")
         DOCKER_BASE=""
         ;;
+    "aarch64")
+        DOCKER_BASE=""
+        ;;
     *)
         echo "Unsupported system architecture(${ARCH}) found for docker image"
         exit 1