linuxptp: update to v4.4

linuxptp: update to v4.4

- Replaced SF project and download URLs with nwtime ones.
  The project is now hosted at https://linuxptp.nwtime.org/.

- Removed 020-gcc14.patch. Missing include was fixed upstream
  in v4.2.

- Added patch to disable MAC library autodetection. That
  can silently pick up unwanted dependencies, depending on
  package build order. We can add linuxptp-<mac lib> variants
  of this package later if there are users of authenticated
  PTP.

Signed-off-by: Shenghao Yang <me@shenghaoyang.info>