WIP: Filter objdump output

This MR serves as a use-case example, and should not be merged.

When changes have been made to an ELF file, the objdump section is usually the most helpful to understand behavior changes. However, because of offset changes, it is often difficult to see at a glance which instructions have actually been modified. I thus tried to mask offsets that can be safely ignored to get to the bottom of what has been modified. Note that some of these changes have already been merged in !57 (closed).