Add modifiers for unsigned char and signed char field printing for __builtin_dump_struct.

Patch by Paul Semel.

llvm-svn: 330188
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index c08478c..dd245dd 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -949,6 +949,8 @@
   if (Types.empty()) {
     Types[Context.CharTy] = "%c";
     Types[Context.BoolTy] = "%d";
+    Types[Context.SignedCharTy] = "%hhd";
+    Types[Context.UnsignedCharTy] = "%hhu";
     Types[Context.IntTy] = "%d";
     Types[Context.UnsignedIntTy] = "%u";
     Types[Context.LongTy] = "%ld";