bpf: git mv DnsResolver bpf/dns_helper

This is entirely bpf specific logic for the dns_helper.so
shared library.  Let's put it under bpf/ so it can be covered
by bpf source hash logic and used by UML NetBpfLoad test.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I7b544cb1db9f13f2467519068cefd236b814413a
8 files changed