Revert r303159 "[DWARF] - Use DWARFAddressRange struct instead of uint64_t pair for DWARFAddressRangesVector."

Something went wrong, it broke BB.
http://green.lab.llvm.org/green//job/clang-stage1-cmake-RA-incremental_build/38477/consoleFull#-200034420049ba4694-19c4-4d7e-bec5-911270d8a58c

llvm-svn: 303162
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFDebugAranges.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
index 72db70d..0cf71f5 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFDebugAranges.cpp
@@ -54,8 +54,10 @@
     if (ParsedCUOffsets.insert(CUOffset).second) {
       DWARFAddressRangesVector CURanges;
       CU->collectAddressRanges(CURanges);
-      for (const auto &R : CURanges)
-        appendRange(CUOffset, R.LowPC, R.HighPC);
+      for (const auto &R : CURanges) {
+        appendRange(CUOffset, R.first, R.second);
+      }
+    }
   }
 
   construct();