Fix an issue in the ARM port where a left shift was predicted to have a Smi...

Fix an issue in the ARM port where a left shift was predicted to have a Smi result when it had an int32 result.  This is a commit of http://codereview.chromium.org/3195004 for Rodolph Perfetta.  Part 2

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5316 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/shifts.js

+// Copyright 2010 the V8 project authors. All rights reserved.
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+
+// Flags: --nofull-compiler
+
+// test a few corners cases with shifts
+
+// The result of the shift is not a Smi.
+var s1 = 0x3fffffff;
+assertEquals(0x7fffffff, (s1 << 1) + 1);
+
+// The result of the shift is not a Smi.
+var s2 = -1;
+assertEquals(0xffffffff, (s2 >>> 0));