<Sound Dev> RFR: 8178685: Update links to guide in javax sound package javadoc

[Sergey Bylokhov]

Hi, Phil.
Looks fine. But, before the push, can you please split the long line before «The Java Sound Tutorial» so it will be 80 chars per line.

> 12 апр. 2017 г., в 22:57, Phil Race <philip.race at oracle.com> написал(а):
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8178685
> Webrev : http://cr.openjdk.java.net/~prr/8178685/
> 
> The package descriptions for the javax/sound packages
> reference a relative link which is not valid in JDK 9 docs.
> The docs/pub team recommend linking directly to the
> tutorial (which was indirectly linked before) as being a stable
> suitable replacement.
> 
> -phil.