[紹棠] ReactNative : ignoring return value of function declared with warn_unused_result attribute

運行ReactNative 的項目會報錯 ignoring return value of function declared with warn_unused_result attribute 解決方法：RCTWebSocket => TAGETS =>Build Settings => Custom Compiler Flags 去掉 -Werror -Wall兩個flags 再運行項目就可以

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