Changed hash table to use more of the hash value when probing.

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
===================================================================
--- src/ia32/assembler-ia32.h	(revision 2481)
+++ src/ia32/assembler-ia32.h	(working copy)
@@ -597,6 +597,9 @@
   void xor_(const Operand& src, Register dst);
   void xor_(const Operand& dst, const Immediate& x);
 
+  // Rotate dist right count times, asserts count < 32.
+  void ror(Register dst, uint32_t count);
+
   // Bit operations.
   void bt(const Operand& dst, Register src);
   void bts(const Operand& dst, Register src);