[WIP] Basic support for Sony Xperia Arc ("semc-anzu")
So far, it boots successfully to Weston and supports the touch screen. I can also SSH into the device over USB. More support in progress.
There is no TWRP version capable of installing the sideload package (I might be able to get a port of TWRP 3.1.0 working, however), so you'll have to install it using a computer directly to the SD card. As my Xperia Arc is officially unlocked, I used fastboot to install the kernel.
Most 2011-era Xperia devices seem to share a lot of similarities internally, so hopefully getting one to work will make it easy to get all of the other ones to work.