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

X-SVN-Rev: 39501
7761 files changed
tree: eb9b7c18faa105741c2611d73e43392a54dfeb43
  1. icu4c/
  2. icu4j/
  3. .gitattributes
  4. .gitignore