lang/fpc-*: Merge all units to lang/fpc

- Merge all fpc-* units to lang/fpc. It gives us a better way to maintain fpc
  and lazarus ports.
- Update Mk/fpc.mk for reflects new changes
- Update Mk/lazarus.mk for reflects new changes
- Now we can defined WANT_FPC_DEVEL AND WANT_LAZARUS_DEVEL for use devel version
  of fpc or lazarus for build apps based on fpc/lazarus
- Add entries to MOVED
- Bump PORTREVISON of affected ports
- Some other minor modifications