Don't assign line table entries to code not contained in the entry...

[jingham]

Summary

If you have code before the first line table entry when debugging with .o files on macOS, the LineTable entry search code was assigning all that code to the first line table entry. Don't do that.

[jingham]

Closed by r298289.

source/Symbol/LineTable.cpp

if (search_entry.file_addr != LLDB_INVALID_ADDRESS) {
                     prev_pos->is_terminal_entry == false)
                   --pos;
                 else
                   break;
               }
             }
           }
         }
+        else
+        {
+          // There might be code in the containing objfile before the first line
+          // table entry.  Make sure that does not get considered part of the first
+          // line table entry.
+          if (pos->file_addr > so_addr.GetFileAddress())
+            return false;
+        }
 
         // Make sure we have a valid match and that the match isn't a
         // terminating
         // entry for a previous line...
         if (pos != end_pos && pos->is_terminal_entry == false) {
           uint32_t match_idx = std::distance(begin_pos, pos);
           success = ConvertEntryAtIndexToLineEntry(match_idx, line_entry);
           if (index_ptr != nullptr && success)