ardour3 r10465; raptor vs raptor2; liblrdf 0.5.0; slv2 build fix

[Juergen Lock]

Hi!

 So I updated my preliminary ardour3 port patch to r10461 and found
ardour crashed due to now linking to both textproc/raptor and
textproc/raptor2 which conflict, turns out it's a dependency problem:
ardour3 depends on (among other things) textproc/liblrdf and
audio/slv2, and slv2 now depends on textproc/raptor2 [1] while
textproc/liblrdf still depends on textproc/raptor, so I had to make
an update for textproc/liblrdf to 0.5.0 so that it uses textproc/raptor2
too:

	http://people.freebsd.org/~nox/tmp/liblrdf-0.5.0.patch

and I had to make a patch to [1] fix the build for audio/slv2: (at
least when textproc/raptor is installed too)

	http://people.freebsd.org/~nox/tmp/slv2-0.6.6_1.patch

Both of these have no maintainer so if noone objects I guess I
should just commit these updates?

 The ardour3 r10465 port update is here:

	http://people.freebsd.org/~nox/tmp/ardour-3.0alpha10-preliminary4-r10465.patch

and my original ardour3 thread with more info and links about Ardour
3 is here:  (Using a midi keyboard with FreeBSD...)

	http://lists.freebsd.org/pipermail/freebsd-multimedia/2011-September/012432.html

 Enjoy, :)
	Juergen