ticket:10310 C++11 checking in configure script.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34057 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10182 Development branch refresh


git-svn-id: http://source.icu-project.org/repos/icu/icu@34058 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10182 User Mutexes, refresh devel branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu@34059 251d0590-4201-4cf1-90de-194747b24ca1