Sockets.cpp: Fix initialization of UDD socket

Without this line, destination address for a UDD socket is left with
incorrect value AF_UNSPEC. Later on when calling DatagramSocket:write(),
sendto() fails with EINVAL.

This commit fixes test SocketsTest.cpp.

Change-Id: I6e1b7e743a781abdcf69aa9842b30be893633433

CommonLibs/Sockets.cpp

@@ -324,6 +324,7 @@ void UDDSocket::open(const char* localPath)
 void UDDSocket::destination(const char* remotePath)
 {
 	struct sockaddr_un* unAddr = (struct sockaddr_un*)mDestination;
+	unAddr->sun_family = AF_UNIX;
 	strcpy(unAddr->sun_path,remotePath);
 }