Fix the verification of DIEs with DW_AT_ranges.

Summary: Previous code would try to verify DW_AT_ranges and if any ranges would overlap, it would stop attributing any ranges after this to the DIE which caused incorrect errors to be reported that a DIE's address ranges were not contained in the parent DIE's ranges. Added a fix and a test.

Reviewers: aprantl, labath, probinson, JDevlieghere, jhenderson

Subscribers: hiraditya, MaskRay, cmtice, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79962