zone.tab: Fix tzsetup(8) breakage.

zone.tab: Fix tzsetup(8) breakage.

If a country has >1 zones, each one needs a description.

tzdata2011m accidentally violated this rule (when Moldova was split),
which caused tzsetup(8) to exit early and whine about it:

tzsetup: /usr/share/zoneinfo/zone.tab:261: conflicting zone definition

To fix this, add the standard "most locations" for the Europe/Chisinau
zone until the next tzdata2011n arrives.