DebugInfo: Metadata constructs now start with DI*

LLVM r236120 renamed debug info IR constructs to use a `DI` prefix, now
that the `DIDescriptor` hierarchy has been gone for about a week.  This
commit was generated using the rename-md-di-nodes.sh upgrade script
attached to PR23080, followed by running clang-format-diff.py on the
`lib/` portion of the patch.

llvm-svn: 236121
diff --git a/clang/test/OpenMP/simd_codegen.cpp b/clang/test/OpenMP/simd_codegen.cpp
index c638168..022dabc 100644
--- a/clang/test/OpenMP/simd_codegen.cpp
+++ b/clang/test/OpenMP/simd_codegen.cpp
@@ -473,6 +473,6 @@
   for (unsigned i = 131071; i <= 2147483647; i += 127)
     a[i] += bar();
 }
-// TERM_DEBUG: !{{[0-9]+}} = !MDLocation(line: [[@LINE-11]],
+// TERM_DEBUG: !{{[0-9]+}} = !DILocation(line: [[@LINE-11]],
 #endif // HEADER