Add EXPECTED_UPSTREAM file and corresponding tools

See README.md for the documentation about the file format
and the tool usages.

Bug: 111603149
Test: ojluni_modify_expectation add jdk8u/jdk8u121-b13 java.lang.String
Test: tools/expected_upstream/refresh_files.py
Change-Id: I0d17cfa6424aa095bded08bca49d5b30d677c1c6
6 files changed
tree: 80338cf5397ffbee82f5906ce6da8843ca08f51c
  1. ojluni/
  2. tools/
  3. EXPECTED_UPSTREAM