Remove optimization on linux/alpha.
Remove optimization on linux/alpha.

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