gapir: Change log level of replayChangeBackbuffer.
gapir: Change log level of replayChangeBackbuffer.

The other GLES synthetic commands are all logged as INFO as well.

Qining/gapid,pmuetschard/gapid,pmuetschard/gapid,Qining/gapid,pmuetschard/gapid,google/gapid,Qining/gapid,google/gapid,google/agi,google/gapid,google/agi,google/agi,google/agi,Qining/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,Qining/gapid,Qining/gapid,google/gapid,google/agi,Qining/gapid,Qining/gapid,google/agi,google/agi,google/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,google/gapid,google/agi,pmuetschard/gapid