ticket:9101: fix long-secondary-CE32 conditions; improve weight allocation, use more short weights

git-svn-id: http://source.icu-project.org/repos/icu/icu@33792 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: test prefixes & contractions

git-svn-id: http://source.icu-project.org/repos/icu/icu@33793 251d0590-4201-4cf1-90de-194747b24ca1