NanoPi K2 (Amlogic S905)无法下载Android源码

根据http://wiki.friendlyarm.com/wiki/index.php/NanoPi_K2/zh下载Android源码的步骤如下：

mkdir android && cd android
repo init -u https://github.com/friendlyarm/android_manifest.git -b nanopi-k2-lollipop
repo sync

截图：

而我下载的提示是：

tony@tony-E431:~/Work/ex_sd/source/Amologic/android$ repo init -u https://github.com/friendlyarm/android_manifest.git -b nanopi-k2-lollipop

Your Name  [Tony]: 
Your Email [[e-mail]]: 

Your identity is: Tony <[e-mail]>
is this correct [y/n]? y

repo initialized in /home/tony/Work/ex_sd/source/Amologic/android
tony@tony-E431:~/Work/ex_sd/source/Amologic/android$ repo sync
Fetching projects:   0% (2/547)  fatal: './android_bionic.git' does not appear to be a git repository
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
error: Cannot fetch android_bionic
tony@tony-E431:~/Work/ex_sd/source/Amologic/android$ 

反复测试都是这个错误。

最后，在英文WiKi上找到了下载链接，国外的网盘：https://www.mediafire.com/folder/8xn2iirciznqh/S905#0wml35f517ses