krata: rework cross-compilation

hack/build/cross-compile.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+set -e
+
+TOOLS_DIR="$(dirname "${0}")"
+
+RUST_TARGET="$("${TOOLS_DIR}/target.sh")"
+TARGET_ARCH="$(echo "${RUST_TARGET}" | awk -F '-' '{print $1}')"
+HOST_ARCH="$(uname -m)"
+
+if [ "${HOST_ARCH}" != "${TARGET_ARCH}" ]
+then
+  echo "1"
+else
+  echo "0"
+fi