Bluetooth: eddystone: Fix byteorder of advertisement

This fixes the UUID 128 bits to use the right byte order so it can be
decoded properly:

< HCI Command: LE Set Advertising Data (0x08|0x0008) plen 32
        Length: 21
        Flags: 0x06
          LE General Discoverable Mode
          BR/EDR Not Supported
        128-bit Service UUIDs (complete): 1 entry
          Eddystone Configuration Service (a3c87500-8ed3-4bdf-8a39-a01bebede295)

Change-Id: Ia4aacaf3557d74a248f63cbffb2adb73b076d38c
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>