Properly install gram.h on MSVC builds
Properly install gram.h on MSVC builds

This file is now needed by pgAdmin builds, which started
failing since it was missing in the installer builds.

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