Move hot utf routines into -inl.h.

Change-Id: I7050d8282a7e5870b2bf671d6867c57625e00ccc
diff --git a/runtime/utf.h b/runtime/utf.h
index 4c9a1d9..cc5e6d4 100644
--- a/runtime/utf.h
+++ b/runtime/utf.h
@@ -29,9 +29,10 @@
  * See http://en.wikipedia.org/wiki/UTF-8#Modified_UTF-8 for the details.
  */
 namespace art {
+
 namespace mirror {
-template<class T> class PrimitiveArray;
-typedef PrimitiveArray<uint16_t> CharArray;
+  template<class T> class PrimitiveArray;
+  typedef PrimitiveArray<uint16_t> CharArray;
 }  // namespace mirror
 
 /*