X64: Fixed test .status format, and made test.py forward arch to scons.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index e8953329bffb8fbed0dcee02e39bcb931e4ac2eb..ab33736172022cddf47d1827388039b270abf41c 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -718,6 +718,10 @@ class Assembler : public Malloced {
     shift_32(dst, 0x4);
   }
 
+  void shll(Register dst, Immediate shift_amount) {
+    shift_32(dst, shift_amount, 0x4);
+  }
+
   void shr(Register dst, Immediate shift_amount) {
     shift(dst, shift_amount, 0x5);
   }