fixed libevent version check: add the missing 1.0.x version check
fixed libevent version check: add the missing 1.0.x version check

samanbarghi/memcached,samanbarghi/memcached,elfchief/memcached,memcached/memcached,guikcd/memcached,elfchief/memcached,guikcd/memcached,elfchief/memcached,memcached/memcached,bpzhang/memcached,elfchief/memcached,samanbarghi/memcached,gencer/memcached,guikcd/memcached,rmccullagh/memcached,samanbarghi/memcached,memcached/memcached,gencer/memcached,dormando/memcached,dormando/memcached,dormando/memcached,bpzhang/memcached,gencer/memcached,gencer/memcached,rmccullagh/memcached,dormando/memcached,bpzhang/memcached,memcached/memcached,rmccullagh/memcached,guikcd/memcached,rmccullagh/memcached,gencer/memcached,bpzhang/memcached,dormando/memcached,elfchief/memcached,rmccullagh/memcached,memcached/memcached,guikcd/memcached