Install 9S60 drop20 after drop 18 on Solaris

1. Uninstall last ECN via swetup
2. pkgrm S60UTIL-9
3. rm /opt/UPDATE/APPLY-S60UTIL.9
4. cd /u/integration/solaris/Sol9/ECN9S60_drop20/tools
5. pkgadd -d .
6. cd ..
7. ./swsetup