linux-etxx00: 3.8.7 update

-update to kernel 3.8.7
-improved EOF detection
-improved fastforward/rewind
-improved dts playback
-tuning speed optimizations
-HDMI CEC: use device type 'recorder' instead of 'tuner'
-increased default RC repeat rate
-et4000: fixed SCART RGB mode
-et4000: fixed simultaneous HDMI 1080p and SCART
-et6500: fixed VFD turn off
gst-plugin-dvbmediasink: bump PR

in order to get etxx00 DVBMEDIASINK_CONFIG changes
Merge remote-tracking branch 'openpli3/master' into HEAD