Changes

DWARFDebugLoclists: Make it possible to read relocated addresses
Summary: Handling relocations was not needed when the loclists section
was a DWO-only thing. But since DWARF5, it is possible to use it in
regular objects too, and the standard permits embedding addresses into
the section directly. These addresses need to be relocated in unlinked 
files.
Reviewers: JDevlieghere, dblaikie, probinson
Subscribers: aprantl, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D68271