Fix ecpg's test/ Makefile for out-of-tree (vpath) builds.
Fix ecpg's test/ Makefile for out-of-tree (vpath) builds.

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