Disable running some change tests on unsupported backends.

TBR=vogelheim@chromium.org
BUG=

Review URL: https://codereview.chromium.org/515583002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23468 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/compiler/test-changes-lowering.cc

@@ -304,6 +304,7 @@ TEST(RunChangeBitToBool) {
 
 
 #ifndef V8_TARGET_ARCH_ARM64
+#if V8_TURBOFAN_BACKEND
 // TODO(titzer): disabled on ARM64 because calling into the runtime to
 // allocate uses the wrong stack pointer.
 // TODO(titzer): disabled on ARM
@@ -409,4 +410,5 @@ TEST(RunChangeFloat64ToTagged) {
   }
 }
 
+#endif  // V8_TURBOFAN_BACKEND
 #endif  // !V8_TARGET_ARCH_ARM64