[PATCH] linux: Split tst-ttyname

[Florian Weimer]

* Adhemerval Zanella via Libc-alpha:

>  sysdeps/unix/sysv/linux/Makefile              |   1 +
>  sysdeps/unix/sysv/linux/tst-ttyname-common.c  | 416 ++++++++++++++
>  .../unix/sysv/linux/tst-ttyname-namespace.c   | 147 +++++
>  sysdeps/unix/sysv/linux/tst-ttyname.c         | 512 +-----------------
>  4 files changed, 567 insertions(+), 509 deletions(-)
>  create mode 100644 sysdeps/unix/sysv/linux/tst-ttyname-common.c
>  create mode 100644 sysdeps/unix/sysv/linux/tst-ttyname-namespace.c

I'd prefer if we could stop using the original tst-ttyname name for
clarity.

Thanks,
Florian