Merge branch 'stable-2.12' into stable-2.13

* stable-2.12:
  Make SimpleDateFormat thread safe

Change-Id: I9c9096d58d876cd0270ecb481278e9f8f1abfe03
tree: 9c0d7814352d0a1558b8f6f2c5c82d95fd11290e
  1. lib/
  2. src/
  3. .buckconfig
  4. .gitignore
  5. BUCK
  6. LICENSE