daemon: log errors from bpf.TestDummyProg()
daemon: log errors from bpf.TestDummyProg()

Previously we just checked if bpf.TestDummyProg() returns an error.

Now the error is logged so it is easier to debug what actually happened
if bpf.TestDummyProg() fails.

Fixes: #15448

Signed-off-by: Robin Gögge <a667438ff4dfdb73d9debf986b92671c0f6337b9@outlook.com>

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