ticket:10234: check in layout engine perf test

git-svn-id: http://source.icu-project.org/repos/icu/icu@33861 251d0590-4201-4cf1-90de-194747b24ca1
ticket:7912: add unum_parse and unum_format taking UFormattable (@internal, API proposal to follow)

git-svn-id: http://source.icu-project.org/repos/icu/icu@33862 251d0590-4201-4cf1-90de-194747b24ca1