#953 Jikes 1.22 doesn't ignore custom attributes

[Anonymous]

According to the JVM Specification at
http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html#43817,

unknown attributes should be ignored by class file readers:

"
Use of the remaining predefined attributes is optional;
a class file reader may use the information they
contain, or otherwise must silently ignore those
attributes.
"

This bug causes errors with JRockit Class.java in
version 142_10 and above.