RFR: JDK-8148548: [Linux/Solaris] debuginfo and fastdebuginfo bundle contains demo info

[Tim Bell]

Erik:

> When introducing the new bundle targets in the top level makefiles, I 
> accidentally added the demo debuginfo files in the jdk symbols bundle. 
> This patch filters out any demo and sample files from the symbols bundle.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8148548
>
> Webrev: http://cr.openjdk.java.net/~erikj/8148548/webrev.01/

Looks good to me.

/Tim