Description of problem:
Use the -o option to specify the output file of an undo operation make prelink
always fail since no security context can be retrieved.  Creating even an empty
file with the name provided as the -o parameter cures the problem.  The bug is
that the retrieval of the context is unnecessary.

Version-Release number of selected component (if applicable):
prelink-0.3.3-1

How reproducible:
always

Steps to Reproduce:
1.creat binary foo
2.run 'prelink foo'
3.rm -f foo-undo
4.run -u -o foo-undo foo
  
Actual results:
prelink: Could not get security context for foo-undo: No such file or directory

Expected results:
Undone prelinking, no message

Additional info: