Log Message:
Changes:
* Update configure for auto detection of system libx264 configuration
* Add tile format frame packing value
* Stricter validation of crop-rect values
* Add mono frame packing value
* Validate frame packing value instead of clipping
* x86inc: Correctly warn on use of SSE2 instructions in SSE functions
* x86inc: Fix instantiation of YMM registers
* matroska: Correctly write display width and height in stereo mode
* Use POC type 0 for AVC-Intra
* Fix ARCH variable name conflict with BSD ports (bsd.port.mk) read-only variable
* Fix negative percentages in final stats output