org.webosports.app.testr: add recipe for testr application

Signed-off-by: Simon Busch <morphis@gravedo.de>
packagegroup-webos-ports-development: add testr application

Signed-off-by: Simon Busch <morphis@gravedo.de>
classes: webos-ports-image: don't pack minimal /dev into our images

We're using devtmpfs so are not required to have a minimal /dev as part of our images.
This will furthermore break the generation of android fastboot images as they are not
supporting special files like character or block devices.

Signed-off-by: Simon Busch <morphis@gravedo.de>
packagegroup-webos-ports-development: add gdbserver and bc

Signed-off-by: Simon Busch <morphis@gravedo.de>