[proaudio] Doc install error for jack 1.9.7

[Alexandros Diamantidis <adia@xxxxxxxxx>]

Installation of media-sound/jack-audio-connection-kit-1.9.7
fails with the following error if use doc is enabled:

Installing doxygen documentation... 
[...]
OSError: [Errno 2] No such file or directory: 'build/default/html'

Searching for this error I found the following:

http://www.mail-archive.com/opensuse-commit@xxxxxxxxxxxx/msg02757.html

> # This is a workaround because the doc build looks for
> # build/default/html but there isn't one.
> ln -s ../../html html

The following patch fixes the ebuild:

--- jack-audio-connection-kit-1.9.7.ebuild~	2011-06-12 19:12:18.587996856 +0300
+++ jack-audio-connection-kit-1.9.7.ebuild	2011-06-12 19:12:18.590996856 +0300
@@ -62,5 +62,6 @@
 }
 
 src_install() {
+	ln -s ../../html build/default/html
 	./waf --destdir="${D}" install || die "waf install failed"
 }