cmake HAVE_GETWD examples

alibaba/AliSQL configure.cmake :522 

CHECK_FUNCTION_EXISTS (getwd HAVE_GETWD)

arkdb/arkproxy configure.cmake :352 

CHECK_FUNCTION_EXISTS (getwd HAVE_GETWD)

alibaba/AliSQLBackup configure.cmake :438 

CHECK_FUNCTION_EXISTS (getwd HAVE_GETWD)