ticket:10062: Fix header documentation for getDayOfWeekType, getWeekendTransition

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33467 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10061: Make getDayOfWeekType behave as documented for last weekend day; fix for 1-day weekends

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@33468 251d0590-4201-4cf1-90de-194747b24ca1