ticket:10486 Windows build problem with U_USING_ICU_NAMESPACE=0

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34586 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10295 ucleanup experiments.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34587 251d0590-4201-4cf1-90de-194747b24ca1