Class initialization check elimination.

Also, move null check elimination temporaries to the
ScopedArenaAllocator and reuse the same variables in the
class initialization check elimination.

Change-Id: Ic746f95427065506fa6016d4931e4cb8b34937af
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 99285cc..7be70a3 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -65,6 +65,7 @@
 	runtime/proxy_test.cc \
 	runtime/reflection_test.cc \
 	compiler/dex/local_value_numbering_test.cc \
+	compiler/dex/mir_optimization_test.cc \
 	compiler/driver/compiler_driver_test.cc \
 	compiler/elf_writer_test.cc \
 	compiler/image_test.cc \