I don't understand what the "universal" byte order thing tries to
say. Sure, Apple's compilers can produce fat binaries, i.e. containing
code for multiple architectures, which I guess might have differing
byte order. But I think the test for an -arch flag being present here
is backwards, surely if you specify -arch i386 for instance, then we
*know* that the byte order is little endian, not "universal".

Anyway, this broke ICU when built against MacOSX SDK 10.6 at least,
the ICU configury used wrong suffix for ICUDATA_NAME, and genbrk
failed in i18npool with a mysterious "can not initialize ICU.  status
= U_FILE_ACCESS_ERROR" message.