add utils system image, move compat into system-images

system-images/compat/build.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+shopt -s expand_aliases
+
+if [ "$0" != "./build.sh" ]; then
+	>&2 echo "Must be run from compat directory"
+	exit 1
+fi
+
+alias 'rust-musl-builder'='docker run --rm -it -v "$HOME"/.cargo/registry:/root/.cargo/registry -v "$(pwd)":/home/rust/src start9/rust-musl-cross:aarch64-musl'
+
+cd ../..
+rust-musl-builder sh -c "(cd embassy-os/compat && cargo +beta build --release --target=aarch64-unknown-linux-musl --no-default-features)"
+cd embassy-os/compat