Enable wifi under GUI

From working Raspbmc:

smsc95xx 1-1.1:1.0 eth0: register ‘smsc95xx’ at usb-bcm2708_usb-1.1, smsc95xx US B 2.0 Ethernet, b8:27:eb:da:d9:c1
usb 1-1.2: new high-speed USB device number 4 using dwc_otg
usb 1-1.2: New USB device found, idVendor=0b05, idProduct=17ba
usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1.2: Product: 802.11n WLAN Adapter
usb 1-1.2: Manufacturer: Realtek
usb 1-1.2: SerialNumber: 00e04c000001
EXT4-fs (mmcblk0p2): recovery complete
EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) on device 179:2.
devtmpfs: mounted
Freeing unused kernel memory: 188K (c057b000 - c05aa000)
udevd[86]: starting version 175
bcm2708_i2c_init_pinmode(1,2)
bcm2708_i2c_init_pinmode(1,3)
bcm2708_i2c bcm2708_i2c.1: BSC1 Controller at 0x20804000 (irq 79) (baudrate 1000 00)
usbcore: registered new interface driver rtl8192cu