[NaCl SDK] nacl_io: add getnameinfo scaffolding

native_client_sdk/src/libraries/nacl_io/kernel_proxy.h

Index: native_client_sdk/src/libraries/nacl_io/kernel_proxy.h
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_proxy.h b/native_client_sdk/src/libraries/nacl_io/kernel_proxy.h
index 0ac85407f1b0e6c781ffcf7127bfc3b5b0e4af7b..046d92267a7d7abdd060250a326e0f94c1ff1b53 100644
--- a/native_client_sdk/src/libraries/nacl_io/kernel_proxy.h
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_proxy.h
@@ -177,6 +177,13 @@ class KernelProxy : protected KernelObject {
                           const char* service,
                           const struct addrinfo* hints,
                           struct addrinfo** res);
+  virtual int getnameinfo(const struct sockaddr *sa,
+                          socklen_t salen,
+                          char *host,
+                          size_t hostlen,
+                          char *serv,
+                          size_t servlen,
+                          int flags);
   virtual int getpeername(int fd, struct sockaddr* addr, socklen_t* len);
   virtual int getsockname(int fd, struct sockaddr* addr, socklen_t* len);
   virtual int getsockopt(int fd,