Fix VPATH-build problem in new tsearch makefile, per Chad Wagner.
Fix VPATH-build problem in new tsearch makefile, per Chad Wagner.

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