[dsymutil] Implement DW_AT_ranges linking.

Nothing fancy, just a straightforward offset to apply to the original
debug_ranges entries to get them in line with the linked addresses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232232 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed