Fix double close issue

Fix double close issue

When calling the g_io_channel_unref() function, the socket fd is closed
by the glib. The AUL library has a problem that is a double close issue.
This patch is to fix the issue.

+------------------------------------------------------------------------------+
| [__AUL_WORKER__] close(188)                                                  |
| close backtrace() returned 9 addesses                                        |
| [ 0] close /lib/libinterceptor.so(close+0x4d) [0xb60da72a]                   |
| [ 1] ? /lib/libglib-2.0.so.0(+0x430c00ea) [0xb0a620ea]                       |
| [ 2] g_io_channel_shutdown /lib/libglib-2.0.so.0(g_io_channel_shutdown+0x75) |
|      [0xb0aa49f2]                                                            |
| [ 3] ? /lib/libaul.so.0(+0x43c0df00) [0xae66ff00]                            |
| [ 4] g_list_foreach /lib/libglib-2.0.so.0(g_list_foreach+0x13) [0xb0a99080]  |
| [ 5] g_list_free_full /lib/libglib-2.0.so.0(g_list_free_full+0x9)            |
|      [0xb0a9dc0e]                                                            |
| [ 6] ? /lib/libaul.so.0(+0x43c0e284) [0xae670284]                            |
| [ 7] ? /lib/libglib-2.0.so.0(+0x430dbc42) [0xb0a7dc42]                       |
| [ 8] ? /lib/libpthread.so.0(+0x430174c4) [0xb5d044c4]                        |
+------------------------------------------------------------------------------+
| [__MAIN__] close(188)                                                        |
| close backtrace() returned 13 addesses                                       |
| [ 0] close /lib/libinterceptor.so(close+0x4d) [0xb60da72a]                   |
| [ 1] aul_sock_destroy_server /lib/libaul.so.0(aul_sock_destroy_server+0x2e3) |
|      [0xae67302c]                                                            |
| [ 2] aul_finalize /lib/libaul.so.0(aul_finalize+0x15) [0xae673196]           |
| [ 3] _ZN9tizen_cpp11AppCoreBase11OnTerminateEv                               |
|      /lib/libapp-core-cpp.so.1(_ZN9tizen_cpp11AppCoreBase11OnTerminateEv+0x5)|
|	[0xae22d046]                                                           |
| [__MAIN__] EBADF occurs. fd(188)                                             |
+------------------------------------------------------------------------------+

Change-Id: Id465eefae87653d2acb706875732ec176ce95bb1
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>