Using with OpenWRT on Ubuntu 18.04 requires host subversion package

[PaulSchulz]

Using with OpenWRT on Ubuntu 18.04 requires host subversion package
(Probably true for other host platforms as well :-)

I was following the instructions from the repo.

After installing the subversion package (sudo apt install subversion) I was able to build the wiringPi package, and install it on openwrt.
wiringPi_2017-03-03-2.44_arm_arm1176jzf-s_vfp.ipk