Create an option to wic doesn't change fstab file, the final
fstab file will be same that in rootfs and wic doesn't update
file, e.g adding a new mount point.
Users can control the fstab file content in base-files recipe.
This is useful if you want to only create an partition but not
add fstab mount point or add new mount point using label e.g:
LABEL=recovery /recovery auto defaults 0 1
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>