ticket:9101: CollationDataWriter, CollationInfo, genrb builds v2 tailoring binaries

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/markus@34016 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: writeBase() vs. writeTailoring()

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/markus@34017 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: minor bug fixes, fix canonical closure

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/markus@34018 251d0590-4201-4cf1-90de-194747b24ca1