linux JExtractPluginSampleApp worked

Author: ktoso

Samples/JExtractPluginSampleApp/Sources/JExtractPluginSampleLib/MyCoolSwiftClass.swift

@@ -24,3 +24,9 @@ public class MyCoolSwiftClass {
     print("[swift]   number = \(number)")
   }
 }
+
+@_silgen_name("_objc_autoreleaseReturnValue")
+public func _objc_autoreleaseReturnValue(a: Any) {}
+
+@_silgen_name("objc_autoreleaseReturnValue")
+public func objc_autoreleaseReturnValue(a: Any) {}