[automerger skipped] DO NOT MERGE: Update tzdb version to 2019b
am: 5fb00d97a8 -s ours
am skip reason: change_id I2751bda143b6fae32213ae135ed50c87250e8bdb with SHA1 efc1c5634e is in history

Change-Id: I85c2e0eee74733d127f22843dddcc643c736c848