add cp utility script

the scripts will cp into cros_sdk src/script

main_cros_reposync_build.sh

@@ -25,6 +25,8 @@ expect "local_manifests"
 spawn ./cros_reposync.sh ${working_dir}
 expect "repo sync has finished successfully"
 
+spawn ./cros_cp_utilities.sh ${working_dir}
+expect "dut_pty.sh"
 # todo: copy the utility scripts into src/script directory
 
 spawn ./cros_enter_sdk.sh