adt-installer: ensure directory exists before copying/removing
If the installation is done in a directory which already contains a
valid installation, opkg will not install anything and the moving the
contents of /install/dir/opt/poky/1.2 (for example) to /install/dir will
throw some errors. However, the install directory will not be affected.
This patch will ensure that the /install/dir/opt/poky/1.2 exists.
