DO NOT MERGE Add script to automatically apply patches to IANA archive. Failures tested: 1. Invalid patch file halts the process. 2. So does already applied patch. 3. tar command failure halt update too. Bug: 257465699 Test: ./update-tzdata.py finished successfully, no single file was Test: changed. Change-Id: I9f421e72b9cd84c3818a00d5c43325d698ac3bbe Merged-In: I9f421e72b9cd84c3818a00d5c43325d698ac3bbe