build: add zoneinfo2ucode.pl
build: add zoneinfo2ucode.pl

Add a zoneinfo2ucode.pl script which is the ucode equivalent to
zoneinfo2lua.pl. It will generate a ucode module exporting a dictionary
of known timezone names and their corresponding TZ strings.

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

hnyman/luci,openwrt/luci,openwrt/luci,hnyman/luci,hnyman/luci,openwrt/luci,hnyman/luci,openwrt/luci,openwrt/luci,hnyman/luci,hnyman/luci,hnyman/luci,hnyman/luci,openwrt/luci,openwrt/luci,openwrt/luci