cmake NA_UCX_HAS_FIELD_LOCAL_SOCK_ADDR examples

mercury-hpc/mercury src/na/CMakeLists.txt :242

check_c_source_compiles(
    "
    #include <ucp/api/ucp.h>
    int main(void) {
      (void) UCP_EP_PARAM_FIELD_LOCAL_SOCK_ADDR;
      return 0;
    }
    "
    NA_UCX_HAS_FIELD_LOCAL_SOCK_ADDR
  )