rsyslog: use BPN to fix multilib and add all licenses
rsyslog: use BPN to fix multilib and add all licenses

- use BPN instead of PN to fix multilib builds
- add all three licenses
- add DESCRIPTION

Signed-off-by: Jackie Huang <49ec7cfe045884df7178a7e982697c7043dbc82b@windriver.com>

WindRiver-OpenSourceLabs/meta-oe-subset,WindRiver-OpenSourceLabs/meta-oe-subset