fprintf: Allow suppressing the inferred __attribute__((__packed__))

We use things like DW_AT_alignment, so not all of those attributes are
inferred by formats like BTF that lack that info, allow suppressing the
output and make btfdiff ask for both DWARF and BTF output to have this

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 files changed