docs, bpf: improve llvm6.0 dependency note
docs, bpf: improve llvm6.0 dependency note

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

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