Fix util applet permissions

According to the specs, the `Application-Library-Allowable-Codebase` attribute identifies locations (similar to the other codebase attributes). The JRE therefore thinks that "true" was a folder name (I guess).

I manually updated all MANIFEST.MF files by replacing `true` with `*` and resigned them. The jars now work for me with Java7u54.

EDIT: here's the direct link:
http://docs.oracle.com/javase/8/docs/technotes/guides/jweb/security/manifest.html#app_library