Adapt to change in master

(cherry picked from commit 0f812ca24c5c570a5015297bfec744145e8d0e25)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/interop/cenum/CEnumByValueFunctionGenerator.kt

@@ -18,6 +18,7 @@ import org.jetbrains.kotlin.ir.types.getClass
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.util.irCall
 import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
+import org.jetbrains.kotlin.util.OperatorNameConventions
 
 /**
  * Generate IR for function that returns appropriate enum entry for the provided integral value.
@@ -58,7 +59,7 @@ internal class CEnumByValueFunctionGenerator(
                     irCall.dispatchReceiver = irGet(values)
                 }
                 val getElementFn = symbols.arrayGet.getValue(arrayClass)
-                val plusFun = symbols.intPlusInt
+                val plusFun = symbols.getBinaryOperator(OperatorNameConventions.PLUS, irBuiltIns.intType, irBuiltIns.intType)
                 val lessFunctionSymbol = irBuiltIns.lessFunByOperandType.getValue(irBuiltIns.intClass)
                 +irWhile().also { loop ->
                     loop.condition = irCall(lessFunctionSymbol, irBuiltIns.booleanType).also { irCall ->

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/VarargLowering.kt

@@ -147,7 +147,9 @@ internal class VarargInjectionLowering constructor(val context: KonanBackendCont
     }
 
     private val symbols = context.ir.symbols
-    private val intPlusInt = symbols.intPlusInt.owner
+    private val intPlusInt = symbols.getBinaryOperator(
+            OperatorNameConventions.PLUS, context.irBuiltIns.intType, context.irBuiltIns.intType
+    ).owner
 
     private fun arrayType(type: IrType): ArrayHandle {
         val arrayClass = type.classifierOrFail