Add missing pgstat_count_index_scan(), per Andreas Seltenreich.
Add missing pgstat_count_index_scan(), per Andreas Seltenreich.

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