ticket:10253 Fix memory leak in plural rules.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33972 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10255: Fix configure script comment error


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33973 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10253 Fix #include of math.h

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33974 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10267: update test summary message


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33977 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10271: when #include <atomic> doesn't work, don't use it (autoconf mode only)


git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33978 251d0590-4201-4cf1-90de-194747b24ca1