Bug#819188: RFS: icu4j/57.1-1

[殷啟聰 <seamlikok@gmail.com>]

I believe this issue is due to <https://bugs.debian.org/821065>.
According to the buildlog it was using ant_1.9.7-1 which contained
that bug. The new revision 1.9.7-2 is uploaded, hope it works.

And I believe IBM's copyright has been covered by the first section in
d/copyright?

```
Files: *
Copyright: 1995-2016, International Business Machines Corporation
License: ICU
```