* break linḱs to image directory for cmake files to fix race with
do_package and double replacements when restoring from sstate
* avoid double replacements so that they work for sysroot paths imported
from other packages
* documentation
Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
cmake-lib.bbclass could be useful for others in oe-core later but it is
not neccessary for core-image-sato so has no chance of being accepted.
Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>