Add byte swap instructions for ARM and x86.

Change-Id: I03fdd61ffc811ae521141f532b3e04dda566c77d
diff --git a/compiler/dex/compiler_enums.h b/compiler/dex/compiler_enums.h
index 05ca1b5..6ea21fc 100644
--- a/compiler/dex/compiler_enums.h
+++ b/compiler/dex/compiler_enums.h
@@ -181,6 +181,8 @@
   kOpBic,
   kOpCmn,
   kOpTst,
+  kOpRev,
+  kOpRevsh,
   kOpBkpt,
   kOpBlx,
   kOpPush,