cmake HAVE_PTHREAD_ATTR_CREATE examples

alibaba/AliSQL configure.cmake :549 

CHECK_FUNCTION_EXISTS (pthread_attr_create HAVE_PTHREAD_ATTR_CREATE)

arkdb/arkproxy configure.cmake :371 

CHECK_FUNCTION_EXISTS (pthread_attr_create HAVE_PTHREAD_ATTR_CREATE)

alibaba/AliSQLBackup configure.cmake :465 

CHECK_FUNCTION_EXISTS (pthread_attr_create HAVE_PTHREAD_ATTR_CREATE)