[PATCH 2/3] Make various error-related globals thread-local

[Nick Clifton]

Hi Tom,

> 	* Makefile.in: Regenerate.
> 	* aclocal.m4: Include ax_tls.m4.
> 	* ax_tls.m4: New file.
> 	* bfd.c: (bfd_error, input_error, input_bfd, _bfd_error_buf):
> 	Now thread-local.
> 	(bfd_asprintf): Update docs.
> 	* config.in, configure: Regenerate.
> 	* configure.ac: Call AX_TLS.
> 	* po/bfd.pot: Regenerate.

Approved - please apply.

Cheers
   Nick