ticket:10181: fix typo in Arabic unshaping of letter Peh

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33783 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10051 Mutexes: introduce UInitOnce; remove UMTX_CHECK; replace all uses of UMTX_CHECK.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33787 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10051 Mutexes: introduce UInitOnce; remove UMTX_CHECK; replace all uses of UMTX_CHECK. All the directories this time.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33788 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10051 ures_cleanup tweaked for failing test.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33789 251d0590-4201-4cf1-90de-194747b24ca1