ticket:10640: Add C++ MeasureFormat API.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@35069 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10640: Attempt to fix broken build.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@35073 251d0590-4201-4cf1-90de-194747b24ca1