Fix: Prevent adding empty playlist items.
Updated German translation.
Updated Simplified Chinese translation.
EVR-CP: Restart worker threads when resetting the device.

Fixes a crash when switching VSync modes caused by a442540b53b8a040ec0cfd95fce6743922ac386f. But instead of just restarting the VSync thread, all threads are now safely restarted.
update ffmpeg/config.h
include MIPS headers only when ARCH_MIPS is defined
remove the unneeded MIPS files
update ffmpeg (n0.8-19379-gf6fff8e)

Notes: broken atm because our custom files need to be updated too

* libavcodec/h264_dxva.c
* libavcodec/h264_recov.c
* libavcodec/vc1_dxva.c