docs: AUTHORS: add Peter Stuge for his commit

Since we list all authors for their contributions in the AUTHORS,
add Peter Stuge for his improvement on the build system.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
bpfc: support different output formats

Add different bpf opcode pretty printer to support a variety of
output formats for netsniff-ng, xt_bpf, tcpdump, C-like and make
future integration of formats easier.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>