oe.rootfs: update to poky 3b92eb9

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
oe.package_manager: update to poky c34775f

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
sstate.bbclass: update to poky 4572e4c

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Merge pull request #346 from kergoth/fix-updated-overridden-files

Apply upstream updates to the files we override