Added support for generate DWARF .debug_aranges sections automatically.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191052 91177308-0d34-0410-b5e6-96231b3b80d8
Fixed warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191053 91177308-0d34-0410-b5e6-96231b3b80d8