appimage: Fix RUNPATH for libexec
* docker/appimage/build-appimage.sh: Move to ... * src/appimage/build-appimage.sh: here. Fixup libexec. * docker/run-appimage-build.sh: Adjust. * docker/appimage/Dockerfile: Do not copy the build script.
This is a simple hack because linuxdeploy or any of its standard
plugin do known about libexec. We simply run patchelf directly.
Moving the build script makes development easier.