llvm-symbolizer: Fix bug related to TUs interfering with symbolizing
With the merge of TUs and CUs into a single container, some code that
relied on the CU range having an ordered range of contiguous addresses
(for locating a CU at a given offset) broke. But the units from
debug_info (currently only CUs, but CUs and TUs in DWARFv5) are in a
contiguous sub-range of that container - searching only through that
subrange is still valid & so do that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341889
91177308-0d34-0410-b5e6-
96231b3b80d8