Support hard float on arm in optimizing compiler.

Also bump oat version, needed after latest hard float switch.

Change-Id: Idf5acfb36c07e74acff00edab998419a3c6b2965
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 220d745..1638869 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -185,6 +185,7 @@
   virtual Location AllocateFreeRegister(Primitive::Type type) const = 0;
 
   static size_t FindFreeEntry(bool* array, size_t length);
+  static size_t FindTwoFreeConsecutiveEntries(bool* array, size_t length);
 
   virtual Location GetStackLocation(HLoadLocal* load) const = 0;