Hong Kong International Airport location name is outdated (since 1998)

[billyswong]

The Hong Kong International Airport (VHHH) has moved out of Kowloon district since 1998. However, the location database still marks it under Kowloon, Hong Kong and shows the airport weather data under the name of Kowloon.

Suggestion: Either put the weather data under the name of Hong Kong, Hong Kong, or put it under Chek Lap Kok, Hong Kong, or maybe both.

This is not unprecedented as Macau nearby has the same airport data point (VMMC) put under both Macau, Macau and Taipa, Macau.

[billyswong]

libgweather took the simpler approach by removing the district name in 2017.

https://bugzilla.gnome.org/show_bug.cgi?id=791095

[ryanli]

Done in #141.