Add -Wno-error to CFLAGS, so the rest of the tree can compile with -Werror.
Add -Wno-error to CFLAGS, so the rest of the tree can compile with
-Werror.

edespino/gpdb,xuegang/gpdb,janebeckman/gpdb,tpostgres-projects/tPostgres,50wu/gpdb,foyzur/gpdb,ahachete/gpdb,rvs/gpdb,Chibin/gpdb,edespino/gpdb,rvs/gpdb,snaga/postgres-xl,ahachete/gpdb,Postgres-XL/Postgres-XL,Quikling/gpdb,tangp3/gpdb,arcivanov/postgres-xl,0x0FFF/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,randomtask1155/gpdb,pavanvd/postgres-xl,lintzc/gpdb,lintzc/gpdb,xuegang/gpdb,CraigHarris/gpdb,Chibin/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,ashwinstar/gpdb,lintzc/gpdb,foyzur/gpdb,rubikloud/gpdb,atris/gpdb,ahachete/gpdb,Chibin/gpdb,zaksoup/gpdb,atris/gpdb,rvs/gpdb,xinzweb/gpdb,postmind-net/postgres-xl,lpetrov-pivotal/gpdb,foyzur/gpdb,Quikling/gpdb,edespino/gpdb,zaksoup/gpdb,foyzur/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,randomtask1155/gpdb,Quikling/gpdb,CraigHarris/gpdb,atris/gpdb,CraigHarris/gpdb,ahachete/gpdb,0x0FFF/gpdb,zaksoup/gpdb,zaksoup/gpdb,CraigHarris/gpdb,royc1/gpdb,royc1/gpdb,randomtask1155/gpdb,tangp3/gpdb,yuanzhao/gpdb,Chibin/gpdb,zeroae/postgres-xl,Chibin/gpdb,rvs/gpdb,lisakowen/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,Postgres-XL/Postgres-XL,0x0FFF/gpdb,adam8157/gpdb,foyzur/gpdb,chrishajas/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,Quikling/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,edespino/gpdb,royc1/gpdb,tangp3/gpdb,arcivanov/postgres-xl,50wu/gpdb,lisakowen/gpdb,yazun/postgres-xl,janebeckman/gpdb,kmjungersen/PostgresXL,50wu/gpdb,0x0FFF/gpdb,ashwinstar/gpdb,zaksoup/gpdb,ahachete/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,royc1/gpdb,snaga/postgres-xl,yuanzhao/gpdb,50wu/gpdb,lintzc/gpdb,yuanzhao/gpdb,edespino/gpdb,rubikloud/gpdb,foyzur/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,tpostgres-projects/tPostgres,oberstet/postgres-xl,edespino/gpdb,Chibin/gpdb,Chibin/gpdb,kaknikhil/gpdb,chrishajas/gpdb,Quikling/gpdb,Quikling/gpdb,lintzc/gpdb,chrishajas/gpdb,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,janebeckman/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,randomtask1155/gpdb,0x0FFF/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,rvs/gpdb,edespino/gpdb,xinzweb/gpdb,jmcatamney/gpdb,zaksoup/gpdb,ahachete/gpdb,lintzc/gpdb,xuegang/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,edespino/gpdb,chrishajas/gpdb,Chibin/gpdb,zeroae/postgres-xl,greenplum-db/gpdb,chrishajas/gpdb,atris/gpdb,lpetrov-pivotal/gpdb,atris/gpdb,chrishajas/gpdb,lpetrov-pivotal/gpdb,Chibin/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,xuegang/gpdb,adam8157/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,rubikloud/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,50wu/gpdb,rubikloud/gpdb,lpetrov-pivotal/gpdb,kmjungersen/PostgresXL,CraigHarris/gpdb,royc1/gpdb,0x0FFF/gpdb,kmjungersen/PostgresXL,lisakowen/gpdb,kaknikhil/gpdb,rvs/gpdb,Quikling/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,lisakowen/gpdb,ovr/postgres-xl,ahachete/gpdb,techdragon/Postgres-XL,50wu/gpdb,janebeckman/gpdb,janebeckman/gpdb,kaknikhil/gpdb,rvs/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,lisakowen/gpdb,pavanvd/postgres-xl,cjcjameson/gpdb,edespino/gpdb,ovr/postgres-xl,tangp3/gpdb,rubikloud/gpdb,jmcatamney/gpdb,royc1/gpdb,arcivanov/postgres-xl,janebeckman/gpdb,CraigHarris/gpdb,arcivanov/postgres-xl,0x0FFF/gpdb,ovr/postgres-xl,kaknikhil/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,oberstet/postgres-xl,yazun/postgres-xl,yazun/postgres-xl,greenplum-db/gpdb,royc1/gpdb,lintzc/gpdb,rvs/gpdb,xuegang/gpdb,yuanzhao/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,kaknikhil/gpdb,atris/gpdb,lisakowen/gpdb,adam8157/gpdb,postmind-net/postgres-xl,cjcjameson/gpdb,rvs/gpdb,rubikloud/gpdb,adam8157/gpdb,Quikling/gpdb,oberstet/postgres-xl,lintzc/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,kaknikhil/gpdb,xinzweb/gpdb,yazun/postgres-xl,ovr/postgres-xl,snaga/postgres-xl,CraigHarris/gpdb,lisakowen/gpdb,snaga/postgres-xl,xinzweb/gpdb,CraigHarris/gpdb,zeroae/postgres-xl,cjcjameson/gpdb,atris/gpdb,jmcatamney/gpdb,chrishajas/gpdb,atris/gpdb,tangp3/gpdb,yuanzhao/gpdb,xinzweb/gpdb,adam8157/gpdb,lintzc/gpdb,pavanvd/postgres-xl,arcivanov/postgres-xl,xinzweb/gpdb,oberstet/postgres-xl,zaksoup/gpdb,yuanzhao/gpdb,postmind-net/postgres-xl,randomtask1155/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,adam8157/gpdb,adam8157/gpdb,chrishajas/gpdb,janebeckman/gpdb,tpostgres-projects/tPostgres,yuanzhao/gpdb,rvs/gpdb,tpostgres-projects/tPostgres,adam8157/gpdb,yuanzhao/gpdb,janebeckman/gpdb,janebeckman/gpdb,tangp3/gpdb,edespino/gpdb,kaknikhil/gpdb,Quikling/gpdb,ovr/postgres-xl,randomtask1155/gpdb,foyzur/gpdb,xinzweb/gpdb,rubikloud/gpdb,techdragon/Postgres-XL,tpostgres-projects/tPostgres,snaga/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,xuegang/gpdb,pavanvd/postgres-xl,0x0FFF/gpdb,50wu/gpdb,ashwinstar/gpdb,xuegang/gpdb,ahachete/gpdb,kmjungersen/PostgresXL,randomtask1155/gpdb,royc1/gpdb,zaksoup/gpdb,greenplum-db/gpdb,foyzur/gpdb,kaknikhil/gpdb,Quikling/gpdb,yuanzhao/gpdb,janebeckman/gpdb,tangp3/gpdb,pavanvd/postgres-xl,cjcjameson/gpdb,rubikloud/gpdb,greenplum-db/gpdb,50wu/gpdb