Pass instruction-set from runtime through to spawned dex2oat.

Change-Id: I1727af7beb9f710c29124d4d6bc9175e4856f3cc
diff --git a/runtime/instruction_set.cc b/runtime/instruction_set.cc
new file mode 100644
index 0000000..c964629
--- /dev/null
+++ b/runtime/instruction_set.cc
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "instruction_set.h"
+
+namespace art {
+
+std::string InstructionSetFeatures::GetFeatureString() const {
+  std::string result;
+  if ((mask_ & kHwDiv) != 0) {
+    result += "div";
+  }
+  if (result.size() == 0) {
+    result = "none";
+  }
+  return result;
+}
+
+}  // namespace art