Fix ARM simulator build on Windows.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
===================================================================
--- src/arm/assembler-arm.h	(revision 11193)
+++ src/arm/assembler-arm.h	(working copy)
@@ -510,7 +510,7 @@
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
     if (f == VFP3 && !FLAG_enable_vfp3) return false;
-    return (supported_ & (1u << f)) != 0;
+    return (supported_ & (static_cast<uint64_t>(1u) << f)) != 0;
   }
 
 #ifdef DEBUG
@@ -567,7 +567,7 @@
     explicit TryForceFeatureScope(CpuFeature f)
         : old_supported_(CpuFeatures::supported_) {
       if (CanForce()) {
-        CpuFeatures::supported_ |= (1u << f);
+        CpuFeatures::supported_ |= (static_cast<uint64_t>(1u) << f);
       }
     }
 
@@ -585,15 +585,15 @@
       return Serializer::enabled();
     }
 
-    const unsigned old_supported_;
+    const uint64_t old_supported_;
   };
 
  private:
 #ifdef DEBUG
   static bool initialized_;
 #endif
-  static unsigned supported_;
-  static unsigned found_by_runtime_probing_;
+  static uint64_t supported_;
+  static uint64_t found_by_runtime_probing_;
 
   DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
 };