dwarfdump: add command line support for dumping the tu_index section

llvm-svn: 252830
diff --git a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
index 8bf9225..7de712f 100644
--- a/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ b/llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -69,7 +69,8 @@
         clEnumValN(DIDT_StrDwo, "str.dwo", ".debug_str.dwo"),
         clEnumValN(DIDT_StrOffsetsDwo, "str_offsets.dwo",
                    ".debug_str_offsets.dwo"),
-        clEnumValN(DIDT_CUIndex, "cu_index", ".debug_cu_index"), clEnumValEnd));
+        clEnumValN(DIDT_CUIndex, "cu_index", ".debug_cu_index"),
+        clEnumValN(DIDT_CUIndex, "tu_index", ".debug_tu_index"), clEnumValEnd));
 
 static void error(StringRef Filename, std::error_code EC) {
   if (!EC)