swing-worker-1.2-bp150.2.4

- Fix build with jdk9: specify java source and target 1.6
- Added patches:
  * swing-worker-1.2-nosource.patch
    + Don't hardcode the source and target levels in the build.xml
    + We are specifying them on command-line
  * swing-worker-1.2-encoding.patch
    + Patch out the offending characters instead of specifying the
    encoding, since there are different encodings in different
    files.

- Cleanup with spec-cleaner and do not version javadoc dir.

- -target=1.5 -source=1.5

- Initial packaging (version 1.2)