classes/buildhistory: improve collection of package info
Use a function added to SSTATEPOSTINSTFUNCS and read the necessary
information out of pkgdata, instead of using a function executed
during do_package that reads the data directly. This has two benefits:
* The package info collection will now work when the package content is
restored from shared state
* Adding/removing the inherit of buildhistory will no longer change the
do_package signatures and force re-execution of that function for
every recipe.
Fixes [YOCTO #5358]
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
