Add missing ecpg function prototype needed when in threaded mode --- supresses compiler warning.
Add missing ecpg function prototype needed when in threaded mode ---
supresses compiler warning.

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