[oe] [rfc] stamp removal

[pHilipp Zabel]

Hi,

I was wondering whether it would be a nice touch to have tasks that
remove other task's results remove the other tasks's stamps, too.
Example: do_package removes the image dir, so it could remove the
do_install stamp. do_rm_work removes the complete workdir, so it could
remove the do_fetch ... do_package stamps, etc.

I'm often running into errors because bitbake makes certain
assumptions about what is in the work dir just by looking at the
stamps, and currently stamps and workdir state are not always in sync.
Example actions are doing one of the configure/compile/package_write
steps when I forgot that rm_work already had kicked in or doing
package_write to repackage after code changes (currently I manually
have to do_install, too).

regards
Philipp