[DWARF][codegen] Fix for Aranges when split inlining is present

When we enable -fsplit-dwarf-inlining we end up with two entries
in .debug_aranges for each CU. Because it processes Skeleton CU
inline information and DWO CU.

Furthermore address calculations were incorrect because we were processing sections in Skeleton CU.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D118857