Fix codegen_test.

Native and ART do not have the same calling convention for ART,
so we need to adjust blocked and allocated registers.

Change-Id: I606b2620c0e5a54bd60d6100a137c06616ad40b4
diff --git a/compiler/optimizing/code_generator_arm.cc b/compiler/optimizing/code_generator_arm.cc
index 824663a..0fe28e8 100644
--- a/compiler/optimizing/code_generator_arm.cc
+++ b/compiler/optimizing/code_generator_arm.cc
@@ -455,7 +455,7 @@
   return Location();
 }
 
-void CodeGeneratorARM::SetupBlockedRegisters(bool is_baseline ATTRIBUTE_UNUSED) const {
+void CodeGeneratorARM::SetupBlockedRegisters(bool is_baseline) const {
   // Don't allocate the dalvik style register pair passing.
   blocked_register_pairs_[R1_R2] = true;