util: Add missing functions to the java wrapper for m5 ops.

Change-Id: I9bdef3cb78cc01b0743ea38eec6f6d28cd2f6765
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27225
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed