[WIC][CLASS] Add EgehogSystemPartitionPlugin class
Add a new WIC's class used as plugin. This class allows to export one or a set of folders from the rootfs and place them into an external partition that inherits that class.
To specify the folders to export this variable have to be populated:
EXTERNAL_ROOTFS_FOLDERS
An example of export of folders /etc, /home and /var:
EXTERNAL_ROOTFS_FOLDERS = "
var/
etc/
home/
"
The partition is setting is:
part / --source edgehog-system-partition --ondisk mmcblk --fstype=ext4 --label datafs --size 128M --align 4
Automatically, this partition will include the folders etc,var and home in its root folder.