tools, headers: Sync struct bpf_perf_event_data

Update struct bpf_perf_event_data with the addr field to match the
tools headers with the kernel headers.

Signed-off-by: Florian Lehner <dev@der-flo.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210123185221.23946-1-dev@der-flo.net