[wasm] test: fix actor_recursive_deinit.swift for WASI

Author: kateinoigakukun

test/Concurrency/Runtime/actor_recursive_deinit.swift

@@ -28,6 +28,10 @@ import WinSDK
 typealias ThreadID = UInt32
 func getCurrentThreadID() -> ThreadID { GetCurrentThreadId() }
 func equalThreadIDs(_ a: ThreadID, _ b: ThreadID) -> Bool { a == b }
+#elseif os(WASI)
+typealias ThreadID = UInt32
+func getCurrentThreadID() -> ThreadID { 0 }
+func equalThreadIDs(_ a: ThreadID, _ b: ThreadID) -> Bool { a == b }
 #endif
 
 var mainThread: ThreadID?