Add source code skeletons for x86 work.  No actual JIT'ng yet.

Change-Id: Ic94a916e777e9bc5163cf205899daf9c18dcafe1
diff --git a/vm/compiler/Compiler.h b/vm/compiler/Compiler.h
index 739d517..6dd9cbd 100644
--- a/vm/compiler/Compiler.h
+++ b/vm/compiler/Compiler.h
@@ -83,7 +83,7 @@
     DALVIK_JIT_THUMB,
     DALVIK_JIT_THUMB2,
     DALVIK_JIT_THUMB2EE,
-    DALVIK_JIT_X86
+    DALVIK_JIT_IA32
 } JitInstructionSetType;
 
 /* Description of a compiled trace. */