Add udata.cpp from ICU for easy breakpoint setting

Change-Id: Ic830275479ef68af50e4df738d9f5d252bb1cdf0
Don't create an icudata library for iOS

The intent being that the data file will be used instead.

To avoid linking error, correspondingly include the ICU stubdata
library in the list of static libraries to link with.

Change-Id: I0f223fcce89dfbe283aaa2fcd2d5a58ea36ba364
Copy the ICU data file into the TiledLibreOffice app

Change-Id: I7f259c96dd9ab0ec833cefd2142682d08b7255b1
Mmap in the ICU data file and pass it to udata_setCommonData()

Now done in TiledLibreOffice's lo_initialize(), but should probably be
done in common LO code instead.

Change-Id: I398a703943d13c6d715e4c88ead2a629955fb7c9