添加dadk支持 (#263)

* 引入dadk，使用dadk0.1.1来编译test-relibc程序

* 由于gitee仓库体积限制导致无法继续使用gitee上的rust索引，因此更换为清华源

* github workflow的环境中，安装dadk

* Auto configure dragonos rust toolchain

tools/write_disk_image.sh

@@ -90,7 +90,7 @@ mkdir -p ${root_folder}/bin/disk_mount/proc
 mkdir -p ${root_folder}/bin/disk_mount/usr
 cp -r ${root_folder}/bin/user/* ${root_folder}/bin/disk_mount/bin
 touch ${root_folder}/bin/disk_mount/dev/keyboard.dev
-cp -r ${root_folder}/bin/sysroot/usr/* ${root_folder}/bin/disk_mount/usr/ 
+cp -r ${root_folder}/bin/sysroot/* ${root_folder}/bin/disk_mount/
 
 # 设置 grub 相关数据
 if [ ${ARCH} == "i386" ] || [ ${ARCH} == "x86_64" ]; then