Check in SDK based on Telink 8278 chipset, solution provided
by Telink Semiconductor (Shanghai) Co., Ltd.

This source code drop contains the open source software. The libraries,
compiler toolchain and other binaries dependencies are hosted by Telink.

ATTENTION:

Please read the “readme” file in the root directory after downloading
this SDK for instructions on getting/setting up the tools, libraries,
and binaries necessary for building the SDK, and all the reference design files.

Software version: 1.42

v1.42 Library version

|       lib name        |          origin           |
| :-------------------: | :-----------------------: |
| libfirmware_encrypt.a |      ble SDK V1.1.1       |
|     liblt_8278.a      |      ble SDK V1.1.1.2     |
|     libapp_ota.a      | google BLE RCU SDK  v1.32 |

v1.42 Changes

  - Added NEC IR override table (4 bytes each key on address 0x79000).
  - Lined up G10/G20 table (use G20 format for both).
  - Shared 4 coloured keys with Fast rewind/Record/PlayPause/FF.
  - Added location information for finding reference design files in
    the readme file.

Change-Id: Ife0a6af5650f86cb9b1d5b1c0caa3d52ffa6c4ab