Fix MSVC build.
Fix MSVC build.

When I moved pg_crc.c from src/port to src/common, I forgot to modify MSVC
build script accordingly.

50wu/gpdb,ashwinstar/gpdb,adam8157/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,lisakowen/gpdb,oberstet/postgres-xl,oberstet/postgres-xl,xinzweb/gpdb,oberstet/postgres-xl,yazun/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,yazun/postgres-xl,yazun/postgres-xl,jmcatamney/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,xinzweb/gpdb,adam8157/gpdb,zeroae/postgres-xl,lisakowen/gpdb,xinzweb/gpdb,ashwinstar/gpdb,ovr/postgres-xl,greenplum-db/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,xinzweb/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,greenplum-db/gpdb,ovr/postgres-xl,xinzweb/gpdb,zeroae/postgres-xl,pavanvd/postgres-xl,oberstet/postgres-xl,adam8157/gpdb,lisakowen/gpdb,xinzweb/gpdb,pavanvd/postgres-xl,xinzweb/gpdb,Postgres-XL/Postgres-XL,adam8157/gpdb,adam8157/gpdb,yazun/postgres-xl,ashwinstar/gpdb,yazun/postgres-xl,ashwinstar/gpdb,techdragon/Postgres-XL,zeroae/postgres-xl,50wu/gpdb,lisakowen/gpdb,ovr/postgres-xl,50wu/gpdb,50wu/gpdb,lisakowen/gpdb,zeroae/postgres-xl,greenplum-db/gpdb,jmcatamney/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,pavanvd/postgres-xl,adam8157/gpdb,50wu/gpdb,pavanvd/postgres-xl,lisakowen/gpdb,ashwinstar/gpdb,adam8157/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,lisakowen/gpdb,50wu/gpdb,adam8157/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,ovr/postgres-xl,pavanvd/postgres-xl,jmcatamney/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,ovr/postgres-xl,greenplum-db/gpdb,greenplum-db/gpdb,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,xinzweb/gpdb