Do not print an empty line if no files were found.

[[Imported from SVN: r6958]]

cmake/scripts/FindFiles.cmake

@@ -6,5 +6,7 @@ foreach(_file ${makefiles})
   if(_testdir)
     list(APPEND _makefiles ${_testdir})
   endif(_testdir)
-endforeach(_file ${_makefiles})
-message("${_makefiles}")
+endforeach(_file ${makefiles})
+if(_makefiles)
+  message("${_makefiles}")
+endif(_makefiles)