Update MySwiftLibrary.swift

Author: ktoso

Samples/SwiftKitSampleApp/Sources/MySwiftLibrary/MySwiftLibrary.swift

@@ -53,3 +53,12 @@ func p(_ msg: String, file: String = #fileID, line: UInt = #line, function: Stri
   print("[swift][\(file):\(line)](\(function)) \(msg)")
   fflush(stdout)
 }
+
+ #if os(Linux)
+ // FIXME: why do we need this workaround?
+ @_silgen_name("_objc_autoreleaseReturnValue")
+ public func _objc_autoreleaseReturnValue(a: Any) {}
+
+ @_silgen_name("objc_autoreleaseReturnValue")
+ public func objc_autoreleaseReturnValue(a: Any) {}
+ #endif