The buildclean task should call the package build system clean
command, just implemented for Make for now.
This is meant for recipes where S == B, but can be useful as a
standalone task for other recipes too.
When S == B, set it to run before do_clean which will do what most
developers expect when calling bitbake -c clean. For S != B, do not
add it before clean as it is not needed and may take some time.
Signed-off-by: Ola x Nilsson <olani@axis.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
