ticket:10455: fix for 'make install' without icuio


git-svn-id: http://source.icu-project.org/repos/icu/icu@34495 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10445: merge of r34495

git-svn-id: http://source.icu-project.org/repos/icu/icu@34496 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10445: update readme for final


git-svn-id: http://source.icu-project.org/repos/icu/icu@34497 251d0590-4201-4cf1-90de-194747b24ca1