ddl: add column ddl missing file.
ddl: add column ddl missing file.

tiancaiamao/tidb,simon-xia/tidb,8cbx/tidb,silentred/tidb,XuHuaiyu/tidb,yangwenmai/tidb,pingcap/tidb,XuHuaiyu/tidb,louishust/tidb,CodeRushing/tidb,ngaut/tidb,gaocegege/tidb,JinheLin/tidb,andelf/tidb,ngaut/tidb,mccxj/tidb,ming-relax/tidb,liyu4/tidb,wusphinx/tidb,Cofyc/tidb,wusphinx/tidb,ngaut/tidb,qiuyesuifeng/tidb,kyle-wang/tidb,gaocegege/tidb,anywhy/tidb,mccxj/tidb,cosmtrek/tidb,ming-relax/tidb,louishust/tidb,astaxie/tidb,8cbx/tidb,EvilMcJerkface/tidb,zs634134578/tidb,c4pt0r/tidb,Nify/tidb,yuanwhy/tidb,andelf/tidb,pingcap/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,pingcap/tidb,zimulala/tidb,spongedu/tidb,kyle-wang/tidb,zimulala/tidb,silentred/tidb,c4pt0r/tidb,ngaut/tidb,qhsong/tidb,Nify/tidb,kyle-wang/tidb,astaxie/tidb,yuanwhy/tidb,ueizhou/tidb,pingcap/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,qhsong/tidb,spongedu/tidb,zs634134578/tidb,ueizhou/tidb,ngaut/tidb,Cofyc/tidb,coocood/tidb,yangwenmai/tidb,c4pt0r/tidb,anywhy/tidb,silenceper/tidb,coocood/tidb,myrice/tidb,kyle-wang/tidb,JinheLin/tidb,ngaut/tidb,myrice/tidb,tiancaiamao/tidb,silenceper/tidb,liyu4/tidb,c4pt0r/tidb,CodeRushing/tidb,cosmtrek/tidb,simon-xia/tidb,qiuyesuifeng/tidb,kyle-wang/tidb,pingcap/tidb