Fix MalformedParameterizedTypeException on classes from kotlin-reflect

This allows GraalVM's `native-image` to work correctly on
kotlin-reflect.jar. The size of the artifact has increased only by 66
bytes

 #KT-23962 Fixed

core/reflection.jvm/reflection.pro

@@ -31,3 +31,7 @@
     public boolean containsKey(java.lang.Object);
     public kotlin.reflect.jvm.internal.pcollections.HashPMap minus(java.lang.Object);
 }
+
+# This is needed because otherwise ProGuard strips generic signature of this class (even though we pass `-keepattributes Signature` above)
+# See KT-23962 and https://sourceforge.net/p/proguard/bugs/482/
+-keep class kotlin.reflect.jvm.internal.impl.protobuf.GeneratedMessageLite$ExtendableMessageOrBuilder