ARM: VIXL32: Use VIXL backend by default.

export ART_USE_OLD_ARM_BACKEND=true to use the previous backend.

Test: mma test-art-host && mma test-art-target

Change-Id: I4024a4ea15fa8ce1269c0837f6ea001b6c809df5
diff --git a/compiler/optimizing/dex_cache_array_fixups_arm.cc b/compiler/optimizing/dex_cache_array_fixups_arm.cc
index cfcb276..0c832a5 100644
--- a/compiler/optimizing/dex_cache_array_fixups_arm.cc
+++ b/compiler/optimizing/dex_cache_array_fixups_arm.cc
@@ -17,23 +17,23 @@
 #include "dex_cache_array_fixups_arm.h"
 
 #include "base/arena_containers.h"
-#ifdef ART_USE_VIXL_ARM_BACKEND
-#include "code_generator_arm_vixl.h"
-#include "intrinsics_arm_vixl.h"
-#else
+#ifdef ART_USE_OLD_ARM_BACKEND
 #include "code_generator_arm.h"
 #include "intrinsics_arm.h"
+#else
+#include "code_generator_arm_vixl.h"
+#include "intrinsics_arm_vixl.h"
 #endif
 #include "utils/dex_cache_arrays_layout-inl.h"
 
 namespace art {
 namespace arm {
-#ifdef ART_USE_VIXL_ARM_BACKEND
-typedef CodeGeneratorARMVIXL CodeGeneratorARMType;
-typedef IntrinsicLocationsBuilderARMVIXL IntrinsicLocationsBuilderARMType;
-#else
+#ifdef ART_USE_OLD_ARM_BACKEND
 typedef CodeGeneratorARM CodeGeneratorARMType;
 typedef IntrinsicLocationsBuilderARM IntrinsicLocationsBuilderARMType;
+#else
+typedef CodeGeneratorARMVIXL CodeGeneratorARMType;
+typedef IntrinsicLocationsBuilderARMVIXL IntrinsicLocationsBuilderARMType;
 #endif
 
 /**