correct bazel define (#1112)
correct bazel define (#1112)

This is required by map_builder_server_main.cc
cartographer-project/cartographer,googlecartographer/cartographer,wohe/cartographer,wohe/cartographer,larics/cartographer,damonkohler/cartographer,wohe/cartographer,cartographer-project/cartographer,damonkohler/cartographer,damonkohler/cartographer,wohe/cartographer,googlecartographer/cartographer,larics/cartographer,larics/cartographer,cartographer-project/cartographer,googlecartographer/cartographer,damonkohler/cartographer,larics/cartographer,cartographer-project/cartographer,googlecartographer/cartographer