For automatic dependency tracking, replace our sed hackery with the GCC- -built-in mechanism through the -MP flag.  Adjust the file extensions to look more like Automake practice.  This frees up the .d suffix for use by DTrace.
For automatic dependency tracking, replace our sed hackery with the GCC-
-built-in mechanism through the -MP flag.  Adjust the file extensions to
look more like Automake practice.  This frees up the .d suffix for use by
DTrace.

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