[PATCH v2 4/8] nptl: Move fork into libc

[Florian Weimer]

* Adhemerval Zanella via Libc-alpha:

> This is part of the libpthread removal project:
>
>    <https://sourceware.org/ml/libc-alpha/2019-10/msg00080.html>
>
> Checked on x86_64-linux-gnu.
> ---
>  nptl/Makefile                                 |  1 -
>  nptl/pt-fork.c                                | 49 -------------------
>  .../sysv/linux/aarch64/libpthread.abilist     |  2 -
>  .../unix/sysv/linux/alpha/libpthread.abilist  |  2 -
>  .../unix/sysv/linux/arm/be/libpthread.abilist |  2 -
>  .../unix/sysv/linux/arm/le/libpthread.abilist |  2 -
>  .../unix/sysv/linux/hppa/libpthread.abilist   |  2 -
>  .../unix/sysv/linux/i386/libpthread.abilist   |  2 -
>  .../unix/sysv/linux/ia64/libpthread.abilist   |  2 -
>  .../linux/m68k/coldfire/libpthread.abilist    |  2 -
>  .../sysv/linux/m68k/m680x0/libpthread.abilist |  2 -
>  .../linux/microblaze/be/libpthread.abilist    |  2 -
>  .../linux/microblaze/le/libpthread.abilist    |  2 -
>  .../sysv/linux/mips/mips32/libpthread.abilist |  2 -
>  .../sysv/linux/mips/mips64/libpthread.abilist |  2 -
>  .../unix/sysv/linux/nios2/libpthread.abilist  |  2 -
>  .../powerpc/powerpc32/libpthread.abilist      |  2 -
>  .../powerpc/powerpc64/be/libpthread.abilist   |  2 -
>  .../powerpc/powerpc64/le/libpthread.abilist   |  2 -
>  .../linux/s390/s390-32/libpthread.abilist     |  2 -
>  .../linux/s390/s390-64/libpthread.abilist     |  2 -
>  .../unix/sysv/linux/sh/be/libpthread.abilist  |  2 -
>  .../unix/sysv/linux/sh/le/libpthread.abilist  |  2 -
>  .../linux/sparc/sparc32/libpthread.abilist    |  2 -
>  .../linux/sparc/sparc64/libpthread.abilist    |  2 -
>  .../sysv/linux/x86_64/64/libpthread.abilist   |  2 -
>  .../sysv/linux/x86_64/x32/libpthread.abilist  |  2 -

Sorry, I missed that fork and __fork aren't removed from Versions.
Please fix that before pushing.

Thanks,
Florian