ICU-12800 move icu maintenance branches into new hierarchy, for icu 50-58

X-SVN-Rev: 39501
7259 files changed
tree: 81cd6f6c1531d8fc63f6895e8b9067dd533bfb39
  1. icu4c/
  2. icu4j/
  3. .gitattributes
  4. .gitignore