this is on armv7 linux, gcc v4.7.3, ICU 55
For some very strange reason, on one machine the `libicudata.so.55.1` file was unusable. It wasn't reported as corrupt, but the loader would just skip it with "library not found".
It seems that `-nostdlib` was the culprit.
Workaround: edit `data/icupkg.inc` and remove `-nostdlib` from the line that begins `LDICUDTFLAGS=`