Bug#894330: Pending fixes for bugs in the proguard package

[pkg-java-maintainers at lists.alioth.debian.org]

tag 894330 + pending
thanks

Some bugs in the proguard package are closed in revision
5fa054d253a7fbbd8018582848089e54c3ee7219 in branch 'master' by Markus
Koschany

The full diff can be seen at
https://anonscm.debian.org/cgit/pkg-java/proguard.git/commit/?id=5fa054d

Commit message:

    Build-depend on gradle and build the Gradle task again.
    
    Closes: #894330