Simplify how we represent relocation iterators.

Instead of using a bit to detect if they are "dynamic", just look at
sh_link.

This is a simplification on its own, and will help with using
llvm-objdump in dynamic objects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264624 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed