ticket:10051 Mutex header file fixes, work in progress.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33658 251d0590-4201-4cf1-90de-194747b24ca1
ticket:7881: accept a list .dat file (for -a -r -x) whose name differs from the ToC prefixes it contains

git-svn-id: http://source.icu-project.org/repos/icu/icu@33659 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10128: patch test data for U+0027 Case_Ignorable

git-svn-id: http://source.icu-project.org/repos/icu/icu@33660 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10128: add ticket number for final data update

git-svn-id: http://source.icu-project.org/repos/icu/icu@33661 251d0590-4201-4cf1-90de-194747b24ca1