message: Move the linkage before the type.
  Though both orders work, this is customary.
diff: #include <stdint.h>
  #include <string.h>
  -bool static host_print_called = false;
  +static bool host_print_called = false;
  // Host function that will be imported into the Web Assembly Instance
  void host_print(const wasmer_instance_context_t *ctx, int32_t ptr, int32_t len)
  