cmake HAVE_PTHREAD_ATTR_GETGUARDSIZE examples

alibaba/AliSQL configure.cmake :550 

CHECK_FUNCTION_EXISTS (pthread_attr_getguardsize HAVE_PTHREAD_ATTR_GETGUARDSIZE)

arkdb/arkproxy configure.cmake :374 

CHECK_FUNCTION_EXISTS (pthread_attr_getguardsize HAVE_PTHREAD_ATTR_GETGUARDSIZE)

alibaba/AliSQLBackup configure.cmake :466 

CHECK_FUNCTION_EXISTS (pthread_attr_getguardsize HAVE_PTHREAD_ATTR_GETGUARDSIZE)