SymbolFileDWARFDwp contains m_debug_cu_index_map which was previously
initialized incorrectly: before m_debug_cu_index.parse is called m_debug_cu_index is empty,
thus the map was not actually getting populated properly.
This diff moves this step into a private helper method
and calls it after m_debug_cu_index.parse inside the public static method SymbolFileDWARFDwp::Create
(the constructor remains private).
Build a toy test example
clang -gsplit-dwarf -g -O0 main.cpp -o main.exe
llvm-dwp -e main.exe -o main.exe.dwp
Build LLDB with ENABLE_DEBUG_PRINTF set.
Run: lldb -- ./main.exe
Check that the indexes are now correct (before this change they were empty)
Check that debugging works (setting breakpoints, printing local variables (this was not working before))