roomservice: Set exit status if we fail to fetch data from github

#!/usr/bin/env python

# Copyright (C) 2012-2013, The CyanogenMod Project

#           (C) 2017,      The LineageOS Project

#           (C) 2017-2018,2020-2021, The LineageOS Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

        result = json.loads(urllib.request.urlopen(githubreq).read().decode())

    except urllib.error.URLError:

        print("Failed to search GitHub")

        sys.exit()

        sys.exit(1)

    except ValueError:

        print("Failed to parse return data from GitHub")

        sys.exit()

        sys.exit(1)

    for res in result.get('items', []):

        repositories.append(res)