Refresh hurd-i386 specific patches:

  - debian/patches/hurd-i386/submitted-net.diff: refreshed.
  - debian/patches/hurd-i386/local-clock_gettime_MONOTONIC.diff: refreshed.
  - debian/patches/hurd-i386/tg-fcntl-internal.h.diff: upstreamed.
  - debian/patches/hurd-i386/tg-pagesize.diff: refreshed.