ticket:9926: Update info about U_COL_SAFECLONE_BUFFERSIZE test

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33258 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9538: minor sync with Java

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33261 251d0590-4201-4cf1-90de-194747b24ca1