Add support for unresolved classes in optimizing.

Change-Id: I0e299a81e560eb9cb0737ec46125dffc99333b54
diff --git a/compiler/optimizing/builder.h b/compiler/optimizing/builder.h
index b2dc241..6910d51 100644
--- a/compiler/optimizing/builder.h
+++ b/compiler/optimizing/builder.h
@@ -236,8 +236,7 @@
                               uint32_t dex_pc);
 
   // Builds a `HInstanceOf`, or a `HCheckCast` instruction.
-  // Returns whether we succeeded in building the instruction.
-  bool BuildTypeCheck(const Instruction& instruction,
+  void BuildTypeCheck(const Instruction& instruction,
                       uint8_t destination,
                       uint8_t reference,
                       uint16_t type_index,