[Interpreter] Adds support for const/let variables to interpreter.

src/interpreter/bytecode-array-builder.h

Index: src/interpreter/bytecode-array-builder.h
diff --git a/src/interpreter/bytecode-array-builder.h b/src/interpreter/bytecode-array-builder.h
index 3cb7945adc973ae2380cac67d54d4e2af8255798..b8a00ff016ee0e6164e3b2040a6bd25eedb40e2d 100644
--- a/src/interpreter/bytecode-array-builder.h
+++ b/src/interpreter/bytecode-array-builder.h
@@ -235,6 +235,8 @@ class BytecodeArrayBuilder final : public ZoneObject, private RegisterMover {
   BytecodeArrayBuilder& JumpIfFalse(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfNull(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfUndefined(BytecodeLabel* label);
+  BytecodeArrayBuilder& JumpIfHole(BytecodeLabel* label);
+  BytecodeArrayBuilder& JumpIfNotHole(BytecodeLabel* label);
 
   BytecodeArrayBuilder& StackCheck();