Changes

In the Remix, the vc (video coreBroadcom VideoCore IV GPU) libraries are in <code>/usr/lib</code> and subdirectories, and the headers are in <code>/usr/include</code>; utilities are in <code>/usr/bin</code> and <code>/usr/sbin</code>. This is different from the Foundation's reference image, which has these files in subdirectories of <code>/opt/vc</code>. The move from <code>/opt</code> to the system directories reflects the fact that these libraries are part of the base system and not a 3rd-party add-on.