ticket:10549: Merging a new collation performance regression test cases from a branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34721 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10553: Add missing udat_close in cdattst.c TestContext()

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34722 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10549: Fixed some scripting problems in the new collation regression test on Windows.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34727 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10532 ICU Charset Detector, port UTF-16 enhancements from Java to C

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34730 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10553: RelativeDateFormat copy constructor was incomplete

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk/source@34731 251d0590-4201-4cf1-90de-194747b24ca1