rpm: Use nodebuginfo option in rpmbuild when exist
rpm: Use nodebuginfo option in rpmbuild when exist

fix:
```
rpmbuild -bb --buildroot /root/cerbero/build/tmpn0_oh6lc/buildroot --target x86_64-redhat-linux /root/cerbero/build/tmpn0_oh6lc/ffmpeg-fluendo-gst-1.0.spec
...
error: Empty %files file /root/cerbero/build/tmpn0_oh6lc/BUILD/ffmpeg-fluendo-gst-1.0-1.0.8.2/debugfiles.list

RPM build errors:
    Empty %files file /root/cerbero/build/tmpn0_oh6lc/BUILD/ffmpeg-fluendo-gst-1.0-1.0.8.2/debugfiles.list
```

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