ticket:10799 change ucln plain C files to C++.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35526 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10799 Windows Project files fixed for renamed files.

git-svn-id: http://source.icu-project.org/repos/icu/icu@35527 251d0590-4201-4cf1-90de-194747b24ca1