DO NOT MERGE Cherry-pick: ICU-20536 Japanese era Reiwa support in ICU4C 60

Cherry-pick https://github.com/unicode-org/icu/commit/76d09144a605d66adfdfd5519376598e4a8840fd

Update data binary file by ./tools/updateicudata.py

Bug: 131312444
Test: CtsIcuTestCases
Test: CtsLibcoreTestCases
Test: CtsLibcoreOjTestCases
Merged-In: I6c1190c364176977e6aed8fda18e63f4cc8df667
Merged-In: Iaaf8b7b1f97073331ad554a10cafee2571a13b15
Change-Id: Iaaf8b7b1f97073331ad554a10cafee2571a13b15
(cherry picked from commit f955ca04b84d03d5f6d0930dc64a0bff0dbcf79c)
32 files changed