Pass instruction-set from runtime through to spawned dex2oat.

Change-Id: I1727af7beb9f710c29124d4d6bc9175e4856f3cc
diff --git a/dex2oat/dex2oat.cc b/dex2oat/dex2oat.cc
index 72effde..552ec89 100644
--- a/dex2oat/dex2oat.cc
+++ b/dex2oat/dex2oat.cc
@@ -740,7 +740,7 @@
 
   // Take the default set of instruction features from the build.
   InstructionSetFeatures instruction_set_features =
-      ParseFeatureList(STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES));
+      ParseFeatureList(Runtime::GetDefaultInstructionSetFeatures());
 
 #if defined(__arm__)
   InstructionSet instruction_set = kThumb2;