Mk/bsd.database.mk: Fix postgresql component specifications

Due to the RUN_DEPENDS and BUILD_DEPENDS specification of postgresql
components in bsd.database.mk not matching their package names,
net-mgmt/netmagis-database was failing during the RUN_DEPENDS stage
because it couldn't detect that a component was already installed.

Updating the pltcl line allowed that port to successfully built. The
other lines weren't tested but the problem would be the same.

Suggested by: wg