Include full ICU data in binary installers

[misterdjules]

If and when #8994 lands, binary installers will ship with small ICU data embedded in the executable file, with data included only for the English language.

Eventually, we want to ship binary installers with full ICU data included as a separate .dat file that is loaded on startup.

This depends on #8983 to be able to load the separate .dat file from a directory relative to the location where node is installed.

Some parts of the implementation of https://github.com/srl295/node/pull/15 could be reused.

cc @srl295 @tjfontaine

[piscisaureus]

If and when #8994 lands, binary installers will ship with small ICU data embedded in the executable file, with data included only for the English language.
Eventually, we want to ship binary installers with full ICU data included as a separate .dat file that is loaded on startup.

But what's the benefit over just building with icu-full, then?

[srl295]

@piscisaureus a couple..

• mac can have 1 copy of the data instead of 2 (fat binaries would have a 32 and a 64 bit)
• can easily update the data by replacing the file

downside is the data has to be located relative to the binary.