makefile: Makefile add buildflag (#4836)
makefile: Makefile add buildflag (#4836)


CodeRushing/tidb,Nify/tidb,pingcap/tidb,kyle-wang/tidb,XuHuaiyu/tidb,mccxj/tidb,c4pt0r/tidb,cosmtrek/tidb,ngaut/tidb,ngaut/tidb,yangwenmai/tidb,spongedu/tidb,c4pt0r/tidb,Cofyc/tidb,tiancaiamao/tidb,Cofyc/tidb,pingcap/tidb,Nify/tidb,XuHuaiyu/tidb,kyle-wang/tidb,pingcap/tidb,qiuyesuifeng/tidb,ngaut/tidb,pingcap/tidb,EvilMcJerkface/tidb,coocood/tidb,yuanwhy/tidb,ming-relax/tidb,mccxj/tidb,qiuyesuifeng/tidb,cosmtrek/tidb,CodeRushing/tidb,8cbx/tidb,kyle-wang/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb,coocood/tidb,yangwenmai/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb,tiancaiamao/tidb,kyle-wang/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb,wusphinx/tidb,c4pt0r/tidb,spongedu/tidb,wusphinx/tidb,EvilMcJerkface/tidb,8cbx/tidb,ming-relax/tidb,yuanwhy/tidb