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>

net/linuxptp/patches/001-fix_kbuild_output.patch

@@ -1,11 +1,11 @@
 --- a/incdefs.sh
 +++ b/incdefs.sh
-@@ -62,7 +62,7 @@ user_flags()
+@@ -152,7 +152,7 @@ user_flags()
  kernel_flags()
  {
  	prefix=""
 -	tstamp=/usr/include/linux/net_tstamp.h
 +	tstamp=/include/uapi/linux/net_tstamp.h
  	ptp_clock=/usr/include/linux/ptp_clock.h
+ 	if_team=/usr/include/linux/if_team.h
  
- 	if [ "x$KBUILD_OUTPUT" != "x" ]; then