Dependency to LLVM >= 6.0 in Documentation modified
Dependency to LLVM >= 6.0 in Documentation modified

 - Linked to section with more infos
 - Clarified that not every BPF program has a dependency on LLVM 6.0+

Signed-off by Marius Gerling marius@gerl1ng.de

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