debian/rules: increment ABI version to 3.7-0

Signed-off-by: Balazs Scheidler <balazs.scheidler@balabit.com>
debian/syslog-ng-core.install: add pacct and cim related SCL files

Signed-off-by: Balazs Scheidler <balazs.scheidler@balabit.com>
debian/syslog-ng.conf: set default version number to 3.7

Signed-off-by: Balazs Scheidler <balazs.scheidler@balabit.com>