stubs: Add qemu_set_fd_handler

Some qemu_set_fd_handler2 stub callers will be converted to
call qemu_set_fd_handler, add this stub for them before making the
change.
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-id: 1433400324-7358-2-git-send-email-famz@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

stubs/set-fd-handler.c

 #include "qemu-common.h"
 #include "qemu/main-loop.h"
 
+int qemu_set_fd_handler(int fd,
+                        IOHandler *fd_read,
+                        IOHandler *fd_write,
+                        void *opaque)
+{
+    abort();
+}
+
 int qemu_set_fd_handler2(int fd,
                          IOCanReadHandler *fd_read_poll,
                          IOHandler *fd_read,