Fix CityBuildings.m_Buildings to use "l" property.
Fix CityBuildings.m_Buildings to use "l" property.

This is because it seems to use some part of JS-translated .NET libraries. And
for now we really don't want to write an external binding for that, so we're
using this workaround to access the "l" property, which is a native Javascript
array.

imps/cncta