Fix SPI example to reflect new-style calling convention for textout().
Fix SPI example to reflect new-style calling convention for textout().

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