[mce] Add support for CPU keepalive during transaction

This uses MCE's D-Bus CPU keepalive interface to make sure the
device does not go to sleep when packagekit is working on something.
[autotools] ./autogen.sh configure script regenerating extravaganza

Automatically autorunning ./autogen.sh on a auto Fedora autosystem with
gobject-introspection-devel autoinstalled, because this is autopparently
what it takes for autotools to autocorrectly re-autogenerate the auto
configure auto script. But still only cherry-pick single autochunks of
the re-generated files, as autoherwise it won't autowork autonymore on
the automake-1.11 that is autoinstalled on the autosdk (the automachine
on which the autogen.sh was auto-ran has automake-1.13). Autofantastic!