In preparation for adding PDB support to LLVM, this moves the
DWARF parsing code to its own subdirectory under DebugInfo, and
renames LLVMDebugInfo to LLVMDebugInfoDWARF.
This is purely a mechanical / build system change.
Differential Revision: http://reviews.llvm.org/D7269
Reviewed by: Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227586 91177308-0d34-0410-b5e6-96231b3b80d8
