[Gradle, JS] whole-program not produce compiler argument

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/OutputGranularity.kt

@@ -17,10 +17,10 @@ enum class KotlinJsIrOutputGranularity {
     }
 }
 
-fun KotlinJsIrOutputGranularity.toCompilerArgument(): String {
+fun KotlinJsIrOutputGranularity.toCompilerArgument(): String? {
     return when (this) {
         KotlinJsIrOutputGranularity.PER_FILE -> PER_FILE
         KotlinJsIrOutputGranularity.PER_MODULE -> PER_MODULE
-        KotlinJsIrOutputGranularity.WHOLE_PROGRAM -> ""
+        KotlinJsIrOutputGranularity.WHOLE_PROGRAM -> null
     }
 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/KotlinJsIrLinkConfig.kt

@@ -77,7 +77,9 @@ internal open class KotlinJsIrLinkConfig(
 
                     val alreadyDefinedOutputMode = any { it.startsWith(PER_MODULE) }
                     if (!alreadyDefinedOutputMode) {
-                        add(task.outputGranularity.toCompilerArgument())
+                        task.outputGranularity.toCompilerArgument()?.let {
+                            add(it)
+                        }
                     }
                 }
             }