Unify the invoke stubs and replace "oat" with "Art" in the API.

Change-Id: Ic1529d7568bd5297fdce4da69ede67c2f48487a4
diff --git a/src/compiled_method.cc b/src/compiled_method.cc
index e122816..f718991 100644
--- a/src/compiled_method.cc
+++ b/src/compiled_method.cc
@@ -73,7 +73,7 @@
   CHECK_NE(gc_map.size(), 0U);
 
 #if !defined(ART_USE_LLVM_COMPILER)
-  // Should only be used with CompiledMethods created with oatCompileMethod
+  // Should only be used with CompiledMethods created with the non-LLVM compilers.
   CHECK_NE(mapping_table_.size(), 0U);
   CHECK_NE(vmap_table_.size(), 0U);
 #endif