Update test-check-eof for smoke test

We have recently add the `/.github` directory to the list of
paths checked by `check_eof.py` as a part of the `test-check-eof`
CTest test. The unpredicted consequence of this is that the smoke
test in the downstream Fedora CI started to fail. The reason is
that we don't ship the `/.github` directory as a part of our
released tarball. It doesn't make sense to ship this directory
as a part of the tarballs because this contains the upstream CI
configurations etc. OTOH it makes sense to skip this directory
when it isn't present.

See for example the CI results of the smoke test in:
https://src.fedoraproject.org/rpms/scap-security-guide/pull-request/34

Addressing:
```
118/333 Test ComplianceAsCode#118: test-check-eof ...................................................***Failed    4.33 sec
The path /root/rpmbuild/BUILD/scap-security-guide-0.1.71/.github does not exist!
```

utils/check_eof.py

@@ -34,7 +34,7 @@ def get_all_files(paths: list) -> list:
         p = pathlib.Path(path)
         if not p.exists():
             sys.stderr.write(f"The path {p.absolute()} does not exist!\n")
-            exit(3)
+            continue
         files.extend(get_files(p))
     return files