let parrot_package_run use the ld-linux.so file in the package.
Add --env-list parameter into parrot_package_run

This allows the user to use their own environment variables file.
Add --env-list parameter into chroot_package_run

This allows the user to use their own environment variables file.
check whether the path parameter of line_process is empty.
Merge remote-tracking branch 'ccl/pull/519/head'.

* ccl/pull/519/head:
  check whether the path parameter of line_process is empty.
  Add --env-list parameter into chroot_package_run
  Add --env-list parameter into parrot_package_run
  let parrot_package_run use the ld-linux.so file in the package.