Should implement comparable, based on function name and CFA value.
Log message: 2007-02-16 Mike Cvet <mcvet@redhat.com> * FrameIdentifier.java: Added. Uses a StackFrame name and CFA to identify a StackFrame. Fixes #4062. * StackFrame.java (toPrint): Changed back to FrameCursor.getMethodName() since getSymbolName is broken, via #4063. (frameIdentifier): Added. (StackFrame): Initialize above member. (getFrameIdentifier): Added.