JVET-Z0209: Early termination during calculating RDcost of depth
We add a new macro definition JVET-Z0209 in TypeDef.h and set it to 1 by default, which is the top-level switch to disable/enable the JVET-Z0209 algorithm. It is also possible to disable JVET-Z0209 algorithm by setting the UseEarlyCostDetection (default 1) syntax in cfgs to 0, even though the JVET-Z0209 macro is enabled in the code.