better build setups for testing and release

build-bench-boot

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -eu
+test_size=1
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --size)
+      test_size="$2"
+      shift 2
+      ;;
+  esac
+done
+./build --all-archs qemu-gem5-buildroot
+if [ "$test_size" -ge 3 ]; then
+  ./build --arch aarch64 all-linux
+fi