ticket:10128: new BidiTest.txt with test data for more than 63 levels

git-svn-id: http://source.icu-project.org/repos/icu/icu@33690 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10142: ICU4C branches for use by Mati

git-svn-id: http://source.icu-project.org/repos/icu/icu@33692 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10142: UBA 6.3 branch from trunk at r33690

git-svn-id: http://source.icu-project.org/repos/icu/icu@33694 251d0590-4201-4cf1-90de-194747b24ca1