[Interpreter]: Add kRegList operand type for register list operands.

test/unittests/interpreter/bytecode-decoder-unittest.cc

Index: test/unittests/interpreter/bytecode-decoder-unittest.cc
diff --git a/test/unittests/interpreter/bytecode-decoder-unittest.cc b/test/unittests/interpreter/bytecode-decoder-unittest.cc
index 7d61f6a1b36d433495b13f73989dd620c45cce5e..5c6f60d2446ee197b8b8853671eb891bb3374d7f 100644
--- a/test/unittests/interpreter/bytecode-decoder-unittest.cc
+++ b/test/unittests/interpreter/bytecode-decoder-unittest.cc
@@ -37,10 +37,14 @@ TEST(BytecodeDecoder, DecodeBytecodeAndOperands) {
        "LdaSmi.ExtraWide [-100000]"},
       {{B(Star), R8(5)}, 2, 0, "            Star r5"},
       {{B(Wide), B(Star), R16(136)}, 4, 0, "      Star.Wide r136"},
-      {{B(Wide), B(Call), R16(134), R16(135), U16(2), U16(177)},
+      {{B(Wide), B(Call), R16(134), R16(135), U16(10), U16(177)},
        10,
        0,
-       "Call.Wide r134, r135, #2, [177]"},
+       "Call.Wide r134, r135-r144, [177]"},
+      {{B(ForInPrepare), R8(10), R8(11)},
+       3,
+       0,
+       "         ForInPrepare r10, r11-r13"},

[mythria, 2016/10/03 10:29:34]

May be one more test case with Reg count of 0 for RegList. Something like
CallRuntime with 0 arguments?

[rmcilroy, 2016/10/05 15:48:45]

Good point - done.

       {{B(Ldar),
         static_cast<uint8_t>(Register::FromParameterIndex(2, 3).ToOperand())},
        2,