tzdata packages and templates

This directory contains the GN templates that provide data files for packages and underlying programs that need to load IANA timezone data as provided by the ICU library.

icu_tzdata_resource

NOTE: Most components should not use this rule to consume tzdata. Instead, use the tzdata directory capability to get the latest tzdata provided by the platform.

This rule adds the files metaZones.res, timezoneTypes.res, and zoneinfo64.res to a package under the path /pkg/data/tzdata/icu/{data_version}/{format}/.

There will also be a file at /pkg/data/tzdata/revision.txt containing the time zone database revision ID, e.g. 2019c.