[Rpm-maint] Do not abort if chown/chmod fails but the file is already correct

[Michael Schroeder]

This small patch makes rpm not abort the installation if chown()/chmod()
faild but the files already have the correct ownership/mode.
It also allows a failed mtime update on directories.

IIRC the use case was some NFS mounted directory.

Cheers,
  Michael.

-- 
Michael Schroeder                                   mls at suse.de
SUSE LINUX Products GmbH,  GF Jeff Hawn, HRB 16746 AG Nuernberg
main(_){while(_=~getchar())putchar(~_-1/(~(_|32)/13*2-11)*13);}
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