Intl: endianness problems?

[srl295]

https://github.com/srl295/node/issues/23#issuecomment-70295036 has identified a problem with the v0.12 with respect to cross endianness. The branch https://github.com/srl295/node/tree/srl-v0.12-srl295-23 seems to solve them but may be too drastic (the risk is, it may increase disk footprint on NON cross builds).

The core issue is this:

• to save disk, we don't include ICU's codepage conversion, IDNA, etc code.
• however, to swap endianness (LE to BE) we NEED the above code to properly swap ICU data. ICU bug #11046

Options:

• Build ICU twice - once just to swap, once for the target.
• Figure out how to delete the codepage conversion, etc. while swapping?
• Delete the unused data first, THEN swap

Adding this here since @misterdjules has recommended keeping issues here. FYI @sxa555

[srl295]

Summary - https://github.com/srl295/node/compare/srl-v0.12-srl295-23 seems to fix this as far as we can tell. Could be put behind a conditional to keep footprint down a little bit.