app center；增加發送ping的秒

Assets/AppCenter/Plugins/iOS/Crashes/MSACExceptionModel.h

@@ -0,0 +1,9 @@
+#import <Foundation/Foundation.h>
+
+@interface MSACExceptionModel : NSObject
+
+@property(nonatomic, copy) NSString *type;
+@property(nonatomic, copy) NSString *message;
+@property(nonatomic, copy) NSString *stackTrace;
+
+@end