hdajackretask doesn't check for script's exit code

alsa-project/alsa-tools issue #8 was opened from kroq-gar78:

`hdajackretask` creates a script in `/tmp` before executing it. When `/tmp` is mounted with `noexec`, running that script will fail, but the GUI gives no indication that it failed.

The GUI should check for the exit code of the script, and notify the user appropriately if the script failed to execute.

Also, if this isn't the appropriate place to report a bug, please let me know!

Issue URL : https://github.com/alsa-project/alsa-tools/issues/8 Repository URL: https://github.com/alsa-project/alsa-tools