Move accelerator table defines and constants to Dwarf.h since
we're proposing it for DWARF5.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190074 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Dwarf.cpp b/lib/Support/Dwarf.cpp
index dd9d590..3bacdd3 100644
--- a/lib/Support/Dwarf.cpp
+++ b/lib/Support/Dwarf.cpp
@@ -723,3 +723,19 @@
   }
   return 0;
 }
+
+const char *llvm::dwarf::AtomTypeString(unsigned AT) {
+  switch (AT) {
+  case dwarf::DW_ATOM_null:
+    return "DW_ATOM_null";
+  case dwarf::DW_ATOM_die_offset:
+    return "DW_ATOM_die_offset";
+  case DW_ATOM_cu_offset:
+    return "DW_ATOM_cu_offset";
+  case DW_ATOM_die_tag:
+    return "DW_ATOM_die_tag";
+  case DW_ATOM_type_flags:
+    return "DW_ATOM_type_flags";
+  }
+  return 0;
+}