[Interpreter] Fixes a bug when popping context to correct level on break/continue.

test/cctest/interpreter/bytecode_expectations/CountOperators.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
@@ skipping 199 matching lines @@
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var a = 1; var b = function() { return a }; return ++a;
 "
 frame size: 2
 parameter count: 1
-bytecode array length: 27
+bytecode array length: 29
 bytecodes: [
   B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
   B(PushContext), R(1),
   B(StackCheck),
   B(LdaSmi8), U8(1),
   B(StaContextSlot), R(context), U8(4),
   B(CreateClosure), U8(0), U8(0),
   B(Star), R(0),
   B(LdaContextSlot), R(context), U8(4),
   B(ToNumber),
   B(Inc),
   B(StaContextSlot), R(context), U8(4),
+  B(PopContext), R(1),
   B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   var a = 1; var b = function() { return a }; return a--;
 "
 frame size: 3
 parameter count: 1
-bytecode array length: 31
+bytecode array length: 33
 bytecodes: [
   B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
   B(PushContext), R(1),
   B(StackCheck),
   B(LdaSmi8), U8(1),
   B(StaContextSlot), R(context), U8(4),
   B(CreateClosure), U8(0), U8(0),
   B(Star), R(0),
   B(LdaContextSlot), R(context), U8(4),
   B(ToNumber),
   B(Star), R(2),
   B(Dec),
   B(StaContextSlot), R(context), U8(4),
   B(Ldar), R(2),
+  B(PopContext), R(1),
   B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
@@ skipping 17 matching lines @@
   B(LdaSmi8), U8(2),
   B(KeyedStoreICSloppy), R(2), R(3), U8(1),
   B(Return),
 ]
 constant pool: [
   InstanceType::FIXED_ARRAY_TYPE,
 ]
 handlers: [
 ]