BBB下安装dtc工具

在BBB中将debian系统装在SD卡中，没有dtc工具，编译devicetree相当不方便，让BBB联网后就可以安装dtc工具了，使用也就方便多了。

debian@arm:/run/connman$ sudo apt-get install device-tree-compiler
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  device-tree-compiler
0 upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
Need to get 240 kB of archives.
After this operation, 378 kB of additional disk space will be used.
Get:1 http://mirrors.ustc.edu/debian buster/main armhf device-tree-compiler armhf 1.4.7-3 [240 kB]
Fetched 240 kB in 1s (207 kB/s)          
Selecting previously unselected package device-tree-compiler.
(Reading database ... 22306 files and directories currently installed.)
Preparing to unpack .../device-tree-compiler_1.4.7-3_armhf.deb ...
Unpacking device-tree-compiler (1.4.7-3) ...
Setting up device-tree-compiler (1.4.7-3) ...