Install os.h when we install the other headers...
Install os.h when we install the other headers...

Pointed out by: System Administrator <sysadmin@sba.miami.edu>

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