firmware: video_render: Reduce processing time to avoid dropouts with DTS audio
firmware: Add some upstream fixes for mmal and openmax

kernel: Initial test with trailing atom added to kernel.img
See: https://github.com/raspberrypi/tools/commit/774670ed53080f564ddb74879adcbd18d1730547
firmware: Revert upstream patch that breaks audio_render when used without clock
See: http://forum.kodi.tv/showthread.php?tid=192380&pid=1847655#pid1847655

firmware: venc: Release images when error after open occurs which prevents a hang.
See: https://github.com/raspberrypi/userland/issues/206
See: https://github.com/raspberrypi/firmware/issues/328
See: https://github.com/raspberrypi/firmware/issues/254
kernel: build with standard (not linaro) toolchain
Merge remote-tracking branch 'upstream/master' into 3.17.y

Conflicts:
	kernel.img