Fix distclean in libpq++.
Fix distclean in libpq++.

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