GYP: Make the ARM simulator build with GYP again

build/armu.gypi

Index: build/armu.gypi
===================================================================
--- build/armu.gypi	(revision 8223)
+++ build/armu.gypi	(working copy)
@@ -1,4 +1,4 @@
-# Copyright 2010 the V8 project authors. All rights reserved.
+# Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ -27,6 +27,10 @@
 
 {
   'variables': {
+    'target_arch': 'ia32',
     'v8_target_arch': 'arm',
+    'armv7': 1,
+    'arm_neon': 0,
+    'arm_fpu': 'vfpv3',
   }
 }