Log Message:
PC6001VX: update to 4.2.9.

Upstream changes:
 http://eighttails.seesaa.net/article/504073710.html

4.2.9
* Fixed display hardware acceleration not working.
** Still disabled on Android due to performance issues.
** Hardware acceleration of the display results in lower CPU usage,
   but has been observed to cause lower frame rates for display areas
   larger than Full HD. Please set according to your environment.
* Improved stability of sound playback.