Merge "Add global motion experiment to rdopt" into nextgenv2

diff --cc av1/common/mv.h
Simple merge

diff --cc av1/decoder/decodeframe.c
Simple merge

diff --cc av1/decoder/decodemv.c
Simple merge

diff --cc av1/encoder/bitstream.c
Simple merge

diff --cc av1/encoder/encodeframe.c
Simple merge

diff --cc av1/encoder/rdopt.c
Simple merge