fix: make connect-and-capture executable under debian/tests
fix: make connect-and-capture executable under debian/tests
This script used for the autopkgtests is currently not executable,
causing tests to fail like so:
```
...
46s + xvfb-run -l /tmp/autopkgtest-lxc.ddq71bgy/downtmp/build.pjI/src/debian/tests/connect-and-capture xrdp-screenshot.png
47s /usr/bin/xvfb-run: 184: /tmp/autopkgtest-lxc.ddq71bgy/downtmp/build.pjI/src/debian/tests/connect-and-capture: Permission denied
...
```
This commit amends the issue by making the script executable, fixing
the Permission denied error.
Edited by Tim Andersson