fix sdk log can't be exported issue

Author: Xia Ning

iOS/APIExample/Examples/Advanced/PrecallTest/PrecallTest.swift

@@ -30,7 +30,7 @@ class PrecallTestEntry : UIViewController
         config.areaCode = GlobalSettings.shared.area.rawValue
         // setup log file path
         let logConfig = AgoraLogConfig()
-        logConfig.filePath = LogUtils.sdkLogPath()
+        logConfig.level = .info
         config.logConfig = logConfig
 
         agoraKit = AgoraRtcEngineKit.sharedEngine(with: config, delegate: self)

iOS/APIExample/Examples/Basic/JoinChannelVideo/JoinChannelVideo.swift

@@ -58,7 +58,7 @@ class JoinChannelVideoMain: BaseViewController {
 
         // setup log file path
         let logConfig = AgoraLogConfig()
-        logConfig.filePath = LogUtils.sdkLogPath()
+        logConfig.level = .info
         config.logConfig = logConfig
 
         agoraKit = AgoraRtcEngineKit.sharedEngine(with: config, delegate: self)