Describe the bug
I'm running Ubuntu 18.04 with the latest updates. I've just cloned the repo, checked out the 1.3 tag, installed all of the dependencies and then run ./bootstrap.sh. Everything seems to be OK, except that the gamemoderun script does not have executable permissions.

To Reproduce

1. Clone git repo
2. Checkout 1.3 tag
3. Install all the required dependencies as described in the README
4. run ./bootstrap.sh
5. ls -lart /usr/bin/gamemoderun

Expected behavior
I would have expected the script to be executable.

System Info (please complete the following information):

• OS and version: Ubuntu 18.04
• GameMode Version: 1.3 (bc20bef)