foamListSourceFiles: Do not filter-out "debian" directories.

Fix proposed by Bruno Santos.
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1770

bin/tools/foamListSourceFiles

@@ -84,8 +84,7 @@ find -H $packDir                                                              \
  -e '\@/Make[.A-Za-z]*/[^/]*/@d'                                              \
  -e '\@/[Dd]oxygen/html/@d'                                                   \
  -e '\@/download/@d'                                                          \
- -e '\@/libccmio-.*/@d'                                                       \
- -e '\@/debian/@d'
+ -e '\@/libccmio-.*/@d'
 
 
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