More fixes for libpq's .gitignore file.
More fixes for libpq's .gitignore file.

The previous patches failed to cover a lot of symlinks that are only
added in platform-specific cases.  Make the lists match what's in the
Makefile for each branch.

lisakowen/gpdb,greenplum-db/gpdb,adam8157/gpdb,lisakowen/gpdb,oberstet/postgres-xl,snaga/postgres-xl,lisakowen/gpdb,xinzweb/gpdb,xinzweb/gpdb,50wu/gpdb,kmjungersen/PostgresXL,ashwinstar/gpdb,greenplum-db/gpdb,yazun/postgres-xl,postmind-net/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,Postgres-XL/Postgres-XL,ashwinstar/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,yazun/postgres-xl,arcivanov/postgres-xl,50wu/gpdb,yazun/postgres-xl,kmjungersen/PostgresXL,postmind-net/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,snaga/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,ovr/postgres-xl,adam8157/gpdb,50wu/gpdb,jmcatamney/gpdb,ovr/postgres-xl,tpostgres-projects/tPostgres,oberstet/postgres-xl,oberstet/postgres-xl,zeroae/postgres-xl,postmind-net/postgres-xl,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,greenplum-db/gpdb,xinzweb/gpdb,kmjungersen/PostgresXL,techdragon/Postgres-XL,yazun/postgres-xl,greenplum-db/gpdb,ashwinstar/gpdb,pavanvd/postgres-xl,techdragon/Postgres-XL,adam8157/gpdb,postmind-net/postgres-xl,ashwinstar/gpdb,zeroae/postgres-xl,adam8157/gpdb,xinzweb/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,tpostgres-projects/tPostgres,greenplum-db/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,ashwinstar/gpdb,snaga/postgres-xl,50wu/gpdb,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,50wu/gpdb,ashwinstar/gpdb,snaga/postgres-xl,Postgres-XL/Postgres-XL,zeroae/postgres-xl,tpostgres-projects/tPostgres,lisakowen/gpdb,yazun/postgres-xl,zeroae/postgres-xl,50wu/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,kmjungersen/PostgresXL,tpostgres-projects/tPostgres,jmcatamney/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,ashwinstar/gpdb,ovr/postgres-xl,50wu/gpdb,arcivanov/postgres-xl,techdragon/Postgres-XL,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,ashwinstar/gpdb,techdragon/Postgres-XL,pavanvd/postgres-xl,adam8157/gpdb,adam8157/gpdb,ovr/postgres-xl,techdragon/Postgres-XL,jmcatamney/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,ovr/postgres-xl,oberstet/postgres-xl,snaga/postgres-xl,postmind-net/postgres-xl