configure: The libtiff pkg-config name is libtiff-4.

[Sebastian Lackner]

On 05.11.2015 18:58, Francois Gouget wrote:
> Signed-off-by: Francois Gouget <fgouget at codeweavers.com>
> ---
>  configure.ac | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Checked on Debian 7, Debian Testing, Fedora 19 and OpenSUSE 13.1.
> The funny thing is libtiff.so.4 is TIFF 3.x, and libtiff.so.5 is TIFF 
> 4.x.
> 

libtiff-4 is also the correct pkg-name for:
- Archlinux
- Ubuntu Trusty, Vivid, Wily, Xenial
- Mageia 4 and 5

Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>