Reverse order of s09.08 and s09.07

Change-Id: I7d91679ab5af137cb8c819cbf883e0a074b435a6
renamed:    text_src/09.08__vp8-bitstream__refresh-golden-frame-and-altref-frame.txt -> text_src/09.07__vp8-bitstream__refresh-golden-frame-and-altref-frame.txt
deleted:    text_src/09.07a__vp8-bitstream__refresh-entropy-possibilities.txt
renamed:    text_src/09.07__vp8-bitstream__refresh-entropy-possibilities.txt -> text_src/09.08__vp8-bitstream__refresh-entropy-possibilities.txt