macho: keep actual file offset for zerofill sections separately
This way, we will conform to the standard practice of setting the
offset within the section header to the beginning of the file and
we will be able to track the location of the section in the file
for incremental updates.
ad4a8e7665Jakub Konka committed on 8/27/2021, 11:47:43 AMparent1e65d41