bpf: Add unit test for map info reading
bpf: Add unit test for map info reading

This unit test checks that when creating a map from userspace, the
mapinfo that we read back out of /proc filesystem matches the map info
for the map that was just created. This revealed the bug in the previous
commit.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@cilium.io>

michi-covalent/cilium,tgraf/cilium,michi-covalent/cilium,tklauser/cilium,scanf/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,scanf/cilium,scanf/cilium,cilium-team/cilium,tklauser/cilium,michi-covalent/cilium,scanf/cilium,tklauser/cilium,scanf/cilium,cilium/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,cilium-team/cilium,scanf/cilium,tklauser/cilium,scanf/cilium,michi-covalent/cilium,tgraf/cilium