textproc/liblrdf: update to 0.6.1

While here:

• Reorder some variables.
• Remove post-patch section
• Regenerate patch with makepatch

Accumulated change log:

• Remove a bogus symlink, and release some merged changes that resolve licence

issues.

• Removed more stale auto* files

Reported by: portscout
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D17422