update benchmark readme
update benchmark readme

git-svn-id: 3d5cc44e79dd7516812cdf5c8b2c4439073f5b70@1287 3b38d51a-9144-11de-8ad7-8b2c2f1e2016

Shvid/protostuff,dyu/protostuff,dyu/protostuff,tsheasha/protostuff,Shvid/protostuff,myxyz/protostuff,svn2github/protostuff,protostuff/protostuff,myxyz/protostuff,svn2github/protostuff,tsheasha/protostuff,protostuff/protostuff