Make IrDeclaration.origin mutable

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrDeclaration.kt

@@ -30,7 +30,7 @@ interface IrSymbolOwner : IrElement {
 
 interface IrDeclaration : IrStatement, IrAnnotationContainer {
     val descriptor: DeclarationDescriptor
-    val origin: IrDeclarationOrigin
+    var origin: IrDeclarationOrigin
 
     var parent: IrDeclarationParent
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrDeclarationBase.kt

@@ -25,7 +25,7 @@ import org.jetbrains.kotlin.ir.expressions.IrCall
 abstract class IrDeclarationBase(
     startOffset: Int,
     endOffset: Int,
-    override val origin: IrDeclarationOrigin
+    override var origin: IrDeclarationOrigin
 ) : IrElementBase(startOffset, endOffset),
     IrDeclaration {
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyDeclarationBase.kt

@@ -23,7 +23,7 @@ import kotlin.reflect.KProperty
 abstract class IrLazyDeclarationBase(
     startOffset: Int,
     endOffset: Int,
-    override val origin: IrDeclarationOrigin,
+    override var origin: IrDeclarationOrigin,
     private val stubGenerator: DeclarationStubGenerator,
     protected val typeTranslator: TypeTranslator
 ) : IrElementBase(startOffset, endOffset), IrDeclaration {