ticket:10419: Fix rounding in NumberFormat.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34549 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10219: Fix rounding in TimeUnitFormat.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34550 251d0590-4201-4cf1-90de-194747b24ca1