gold plugin for LTO

hello clang,

we will build our toolchain from source and adding the gold plugin to them. This means we’ll have to repackage rather old versions, presently 3.8.0 and 5.0.0. Instructions at tell to clone binutils and use master/HEAD.

Is this fine (in that the plugin is supposed to be version independent)? if not, are there way to get the specific binutils commit that was used to validate LTO with arbitrary versions of LLVM?