CPackRPM: Do not run file(GLOB_RECURSE) without CMP0009 set to NEW

The file(GLOB_RECURSE) call added by commit 3ec02547 (CPackRPM: Allow
multiple path relocation prefixes for one package, 2015-01-21) should
not follow directory symlinks, so make sure CMP0009 is set to NEW.
1 file changed