Fix socket_android.cc to agree with socket_linux.cc and compile.

runtime/bin/socket_android.cc

Index: runtime/bin/socket_android.cc
diff --git a/runtime/bin/socket_android.cc b/runtime/bin/socket_android.cc
index 61dd61ed98537d12ad9ee0095a8aa190a55c5fe0..31495dd31957a9fe49a14c5920c757a8f824cc87 100644
--- a/runtime/bin/socket_android.cc
+++ b/runtime/bin/socket_android.cc
@@ -25,6 +25,7 @@ namespace bin {
 SocketAddress::SocketAddress(struct sockaddr* sockaddr) {
   ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
   RawAddr* raw = reinterpret_cast<RawAddr*>(sockaddr);
+  const char* result;
   if (sockaddr->sa_family == AF_INET) {
     result = inet_ntop(sockaddr->sa_family,
                        &raw->in.sin_addr,