[Patch] (2/n) newlib: Move vasniprintf.c to ELIX 1 (was: Build-dependency issues with ELIX_LEVEL)

[Tobias Burnus]

Attached is a revised version of the patch in the first email in the thread.
Found when looking for referenced but not provided functions
with nvptx, which sets ELIX Level to 1.


libc/stdio/vdiprintf.c's _vdiprintf_r calls _vasniprintf_r
The file is compiled with ELIX Level 1.

The function _vasniprintf_r is provided either via
* libc/stdio/vasniprintf.c which calls _svfiprintf_r
* libc/stdio/vasnprintf.c (only '#ifdef _NANO_FORMATTED_IO')
   which calls _svfprintf_r

We can ignore the second file as no NANO function calls
it. Thus, only the first file (vasniprintf.c) remains.

The _svfiprintf_r / _svfiprintf_r are provided by
libc/stdio/(nano-)vfprintf.c
Those files are also available with ELIX Level 1.


Solution: Also build vasniprintf.c with ELIX Level 1
instead of building it with ELIX Level 4.

The change should be save as the only library call I see
in that file (vasniprintf.c) is to vfprintf.c. And on the
caller side, the call to _vasniprintf_r is not guarded by
any #if. Thus, no new dependencies should get introduced
by this change.


OK? Comments?

Tobias
(Makefile.inc patch + regenerated Makefile.in as separate patch)
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